Vegetables

Non-Starchy Vegetables List: What Counts and How to Eat Them

The full list of non-starchy vegetables, with USDA carb and fiber counts for 49 of them, the starchy vegetables and where they fit, what the research shows and how to cook them to keep their benefits.

Meet the Medical Advisory Board
Evidence-based48 sources citedUpdated October 9, 2026
Published Oct 5, 2026Last updated Oct 9, 2026Editorial policyMedical review policyFact-checking policy
Yellow, orange and heirloom tomatoes heaped with cucumbers, eggplant, green bell peppers and broccoli on a wooden table
Tomatoes, cucumbers, peppers, eggplant and broccoli, all on the non-starchy vegetables list.
Non-starchy vegetables at a glance

Non-starchy vegetables are the low-carb, high-fiber vegetables, such as leafy greens, broccoli, peppers, zucchini and mushrooms, that the American Diabetes Association (ADA) counts at about 5 grams of carbs or less per serving of ½ cup cooked or 1 cup raw.1

Non-starchy vegetables are the greens, crucifers, peppers, squash, mushrooms and stalks that can fill half your plate while adding very little starch. Two cups of raw spinach add about 2 grams of carbohydrate to a meal. Half a cup of baked sweet potato adds 20.7.9 That difference is why my blood-sugar protocols build every plate around them.23

The list below groups them by family, with the carbs and fiber in each serving from USDA records.

Dr. Axe Protocol

Insulin Resistance & Prediabetes

90-day protocol

The complete root-cause framework for lowering insulin, bringing HbA1c back to healthy and stopping prediabetes before it becomes diabetes — with the labs to prove it’s working.

  • A self-check
  • The four-phase plan
  • A 7-day meal plan

Free with your Dr. Axe account

View the protocol →

My Type 2 Diabetes Protocol ranks non-starchy vegetables among its top 10 foods, and introduces its ranked food list with this line:2

Every meal either steadies your blood sugar or spikes it.Dr. Josh Axe, DC, DNM, CNSWritten in The Type 2 Diabetes Protocol (2026), p. 15
Advertisement20% off Ancient Nutrition Multi Collagen Protein, code MCP20
Advertisement20% off Ancient Nutrition Multi Collagen Protein, code MCP20

What are non-starchy vegetables?

Quick answer

Non-starchy vegetables are vegetables with about 5 grams of carbohydrate or less per serving, where a serving is ½ cup cooked or 1 cup raw, by the American Diabetes Association's definition.1 Leafy greens, broccoli, cauliflower, peppers, tomatoes, zucchini, mushrooms, asparagus and green beans are all on its non-starchy list. A serving of a starchy vegetable, such as potatoes, corn or peas, carries about 15 grams.1

The line between the two groups comes from meal planning for diabetes. The ADA's Diabetes Plate gives non-starchy vegetables half of a 9-inch plate and puts starchy vegetables in the quarter it calls "quality carb."1 My own plate rule has the same shape: half the plate non-starchy color, a quarter protein and a quarter smart carbs.2

The most useful idea for reading the numbers below is net carbs, which is total carbohydrate minus fiber. As the keto diet guide explains, fiber doesn't raise blood sugar, so non-starchy vegetables, which are high in fiber, barely count against your carb budget.10

Get the free Insulin Resistance & Prediabetes protocol

Non-starchy vegetables sit at the center of this free 90-day protocol. It lays out:

  • Its top 10 blood-sugar foods, with non-starchy vegetables at 2 or more cups per meal
  • Why eating vegetables and protein first and carbs last leads to a smaller blood-sugar rise
  • Four phases, in order, plus a 7-day meal plan

Free with your Dr. Axe account (email or Google). You'll also get the protocol's short email series and the Dr. Axe newsletter; unsubscribe anytime.

Open the free protocol →

The complete non-starchy vegetables list

Every number in these tables comes from USDA FoodData Central: carbohydrate and fiber per serving, worked out from each record's per-100-gram values and its own cup or piece weight.9 Each row shows its serving; most raw vegetables are listed per cup and cooked ones per half cup, the ADA's serving sizes.11

Leafy greens and salad greens

Leafy greens are the lowest-carb foods on this page: a cup of most raw greens carries 2 grams of carbohydrate or less.9 I value them for their magnesium, folate and vitamin K, which support methylation, bone health and flexible blood vessels.12

Green (1 cup raw)Carbs (g)Fiber (g)

Spinach

1.1

0.7

Kale

0.9

0.9

Arugula

0.7

0.3

Swiss chard

1.3

0.6

Romaine

1.5

1.0

Collard greens

2.0

1.4

Mustard greens

2.6

1.8

Turnip greens

3.9

1.8

Watercress

0.4

0.2

Endive

1.7

1.6

Radicchio

1.8

0.4

Beet greens

1.6

1.4

Amaranth leaves

1.1

Not reported

Escarole, chicory and every kind of lettuce belong here too.11 So do dandelion greens and broccoli rabe.

Cruciferous vegetables

Cruciferous vegetables carry glucosinolates, among them glucoraphanin, which turns into sulforaphane when you chop or chew them.34 In my view, crucifers are powerful for lowering inflammation.12 Kale, collards, arugula and watercress are crucifers too; they're listed with the greens above.

VegetableServingCarbs (g)Fiber (g)

Broccoli

1 cup raw

6.0

2.4

Broccoli

½ cup boiled

5.6

2.6

Cauliflower

1 cup raw

5.3

2.1

Cauliflower

½ cup boiled

2.5

1.4

Brussels sprouts

1 cup raw

7.9

3.3

Brussels sprouts

½ cup boiled

5.5

2.0

Green cabbage

1 cup raw

5.2

2.2

Red cabbage

1 cup raw

6.6

1.9

Bok choy

1 cup raw

1.5

0.7

Kohlrabi

1 cup raw

8.4

4.9

Radishes

1 cup raw

3.9

1.9

Daikon radish

1 cup raw

4.8

1.9

Turnips

1 cup raw

8.4

2.3

Fruiting vegetables: tomatoes, peppers, squash and more

Botanically, these are the fruits of their plants, but in the kitchen and on the ADA's list, they're non-starchy vegetables.11 Tomatoes, peppers and eggplant are also nightshades, which most people handle well (see the safety section if joint pain is a concern).13

VegetableServingCarbs (g)Fiber (g)

Tomatoes

1 cup raw

7.0

2.2

Red bell pepper

1 cup raw

9.0

3.1

Green bell pepper

1 cup raw

6.9

2.5

Eggplant

1 cup raw

4.8

2.5

Cucumber, with peel

1 cup raw

3.8

0.5

Zucchini

1 cup raw

3.9

1.2

Yellow summer squash

1 cup raw

4.9

1.3

Spaghetti squash

½ cup cooked

5.0

1.1

Chayote

1 cup raw

6.0

2.2

Okra

1 cup raw

7.5

3.2

Stalks, shoots and pods

VegetableServingCarbs (g)Fiber (g)

Asparagus

1 cup raw

5.2

2.8

Celery

1 cup raw

3.0

1.6

Artichoke

1 medium, raw

13.4

6.9

Hearts of palm

1 cup canned

6.7

3.5

Bamboo shoots

1 cup raw

7.9

3.3

Green beans

1 cup raw

7.0

2.7

Green beans

½ cup boiled

4.9

2.0

Snow peas and snap peas (edible pods)

1 cup raw

7.4

2.5

Leeks

1 cup raw

12.6

1.6

Fennel bulb

1 cup raw

6.4

2.7

A medium artichoke carries more carbohydrate than most vegetables here, and it also carries the most fiber of anything in these tables, 6.9 grams.9

Onions, mushrooms, sprouts and others

VegetableServingCarbs (g)Fiber (g)

Onions

1 cup raw, chopped

14.9

2.7

Mushrooms, white

1 cup raw

2.3

0.7

Jicama

1 cup raw

11.5

6.4

Water chestnuts

½ cup raw, sliced

14.8

1.9

Mung bean sprouts

1 cup raw

6.2

1.9

Alfalfa sprouts

1 cup raw

0.7

0.6

Rutabaga

1 cup raw

12.1

3.2

Onions usually go in by the half cup or less, and garlic and scallions by the clove and the handful. In The Biblio Diet, Jordan Rubin and I also list sprouts of all kinds (broccoli, sunflower, pea shoots and radish), sea vegetables such as kelp, dulse and nori, and raw fermented vegetables such as sauerkraut, ideally made without vinegar.8 Microgreens fit here too; on my show, I put them right alongside sprouts.5

Individual vegetables vary around the 5-gram figure. Once you subtract the fiber, 41 of the 49 vegetables in these tables come in at 5 grams of net carbs or less per serving. The other eight (onions, leeks, rutabaga, turnips, jicama, water chestnuts, a whole artichoke and red bell pepper) are still on the ADA's non-starchy list; they simply carry more carbohydrate per serving.119

Starchy vegetables list

Quick answer

Starchy vegetables are the higher-carb vegetables, with about 15 grams of carbohydrate per serving: potatoes, sweet potatoes, yams, corn, green peas, parsnips and winter squash such as butternut and acorn.1 Taro and plantain belong with them, at 20 grams or more per half cup.9 They're whole-food carbs, and they belong in the last quarter of your plate, after the vegetables and protein.2

In Heal Your Cells, Dr. Cole and I group carrots, beets, pumpkin, winter squash and sweet potatoes with the starchy vegetables. They provide resistant starch and carotenoids like beta-carotene, lutein and zeaxanthin, and unlike refined starches, these whole forms release their glucose slowly.12 The ADA lists carrots and beets as non-starchy,11 and their numbers sit between the two groups: half a cup of boiled carrots has 6.4 grams of carbohydrate, and the same amount of boiled beets has 8.5.9 The ADA also counts spaghetti squash, a winter squash, as non-starchy; at 5.0 grams per half cup cooked, it's listed with the fruiting vegetables above.119 If you're counting carbs, use the numbers in the tables.

VegetableServingCarbs (g)Fiber (g)

Carrots

½ cup boiled

6.4

2.3

Carrots

1 cup raw

12.3

3.6

Beets

½ cup boiled

8.5

1.7

Pumpkin

½ cup boiled, mashed

6.0

1.3

Butternut squash

½ cup baked

10.8

3.3

Acorn squash

½ cup baked

15.0

4.5

Green peas

½ cup boiled

12.5

4.4

Sweet corn

½ cup boiled

15.6

1.8

Potato, boiled in skin

½ cup

15.7

1.4

Potato, baked with skin

1 medium

36.7

3.8

Sweet potato, baked in skin

½ cup

20.7

3.3

Parsnips

½ cup boiled

13.3

2.8

Yam

½ cup cooked

18.7

2.7

Taro

½ cup cooked

22.8

3.4

Green plantain

½ cup boiled

20.0

1.8

The ADA also counts beans, peas and lentils as starchy vegetables that double as plant protein.1

Carbs per serving: 1.1 grams in a cup of spinach, 20.7 in half a cup of sweet potato

Carbs per serving: 1.1 grams in a cup of spinach, 20.7 in half a cup of sweet potatoUSDA FoodData Central records · 1 cup raw or ½ cup cooked, the ADA serving. Spinach, 1 cup raw: 1.1 g carbohydrate; Cauliflower, ½ cup boiled: 2.5 g carbohydrate; Zucchini, 1 cup raw: 3.9 g carbohydrate; Broccoli, ½ cup boiled: 5.6 g carbohydrate; Carrots, ½ cup boiled: 6.4 g carbohydrate; Beets, ½ cup boiled: 8.5 g carbohydrate; Green peas, ½ cup boiled: 12.5 g carbohydrate; Potato, ½ cup boiled in skin: 15.7 g carbohydrate; Sweet potato, ½ cup baked: 20.7 g carbohydrateUSDA FoodData Central records · 1 cup raw or ½ cup cooked,the ADA servingSweet potato, ½cup baked20.7 g carbohydratePotato, ½ cupboiled in skin15.7 g carbohydrateGreen peas, ½cup boiled12.5 g carbohydrateBeets, ½ cupboiled8.5 g carbohydrateCarrots, ½ cupboiled6.4 g carbohydrateBroccoli, ½ cupboiled5.6 g carbohydrateZucchini, 1 cupraw3.9 g carbohydrateCauliflower, ½cup boiled2.5 g carbohydrateSpinach, 1 cupraw1.1 g carbohydrate
Source: USDA FoodData Central (SR Legacy) [9]Total carbohydrate per serving, from each record's per-100-gram value and serving weight.

Whole starchy vegetables are good carbs, and the way you eat them matters. Eat protein, fiber and fat first, and the starch last, never on its own.2 Cook potatoes and let them cool before you eat them, even later that day or the next; the starch in white potatoes, sweet potatoes and purple sweet potatoes becomes resistant starch, which I consider the number one starch for supporting butyrate production in your gut.14 On my own plate, the starch, a sweet potato or quinoa, tends to come at lunch with wild-caught salmon and a bunch of vegetables, and dinner runs a little lower in carbs, with a lot of steamed or sautéed vegetables.15 My vegetable list includes white potatoes, sweet potatoes and yams, along with corn when it's organic.8

Portions matter with this group: in large Harvard studies that followed adults for decades, starchy vegetables such as peas, corn and potatoes didn't share the lower risk of death seen with most other vegetables, and adding a daily serving went with weight gain over 4-year periods.1617 Kept to a quarter of the plate and eaten after your vegetables, they fit a healthy day well. For more on this group, see root vegetables.

Which non-starchy vegetables are healthiest?

Quick answer

Broccoli sprouts and watercress top my list, with cruciferous vegetables such as kale, cabbage, Brussels sprouts, broccoli and cauliflower right behind them.56 Variety matters too: aim for 20 to 30 different plants a week.14

On my show, I called broccoli sprouts and watercress probably the most beneficial greens of all.5 Sprouts are an exceptionally rich source of sulforaphane's building block. Johns Hopkins researchers measured 10 to 100 times more glucoraphanin, the compound your body turns into sulforaphane, in 3-day-old broccoli and cauliflower sprouts than in the mature plants.18

When my mom was recovering from cancer through nutrition and lifestyle alongside her medical care, broccoli sprouts were one of the foods we had her eat constantly, and cruciferous vegetables like kale, cabbage, Brussels sprouts, broccoli and cauliflower came next.6

I've also pointed out on my show that the average person gets about 10 different plants in their weekly rotation, and you want to be shooting for 20 to 30, because more plant variety typically means more diverse gut bacteria.14 An easy way to do it: if you're steaming vegetables, do broccoli and cauliflower one day, carrots and asparagus another and zucchini and squash the next.14 For a broader list that includes foods beyond vegetables, see nutrient-dense foods.

What are the health benefits of non-starchy vegetables?

Each card's badge rates the strength of the human research behind it.

1

Steadier blood sugar after meals

Moderate evidenceHuman studyReview of 18 randomized trials · trials of 11 and 15 adults

Eat your vegetables before the starch and your blood sugar rises less after the meal. Trials in adults with type 2 diabetes and with prediabetes, and a 2026 review of 18 randomized trials, all found a smaller blood-sugar rise in the first hour after eating; the numbers and how to put it to work are in the blood-sugar section below.41920

2

A longer life

Moderate evidenceHuman studyTwo cohorts of 108,735 adults · review of 95 cohort studies

In the two Harvard cohorts, which followed 108,735 adults for up to 30 years, people who ate 5 servings of fruits and vegetables a day had 13% lower risk of death from any cause than people who ate 2, with 12% lower risk of cardiovascular death, 10% lower risk of cancer death and 35% lower risk of death from respiratory disease. The lowest risk came at about 5 servings a day, 2 of fruit and 3 of vegetables, and a pooled analysis of 26 cohorts with 1,892,885 people found the same 13% figure.16

A review of 95 studies that followed people over time found that every extra 200 grams (about 7 ounces) of fruits and vegetables a day went with 8% lower risk of coronary heart disease, 16% lower risk of stroke and 10% lower risk of death from any cause, with lower risk continuing up to 800 grams a day for most outcomes. Green leafy vegetables, cruciferous vegetables and salads were among the foods tied to lower risk of cardiovascular disease and death from any cause.21

3

A healthier weight

Moderate evidenceHuman studyThree cohorts of 133,468 adults

Harvard researchers tracked changes in diet and weight in 133,468 U.S. adults over up to 24 years, in 4-year stretches. Each added daily serving of cruciferous vegetables went with 0.68 pound less weight gained over 4 years, each serving of green leafy vegetables with 0.52 pound less, each serving of cauliflower with 1.37 pounds less and each serving of vegetables overall with 0.25 pound less. Vegetables higher in fiber and lower in glycemic load, such as broccoli and Brussels sprouts, were more strongly linked to less weight gain than lower-fiber, higher-glycemic-load ones.17

4

A sharper brain as you age

Moderate evidenceHuman studyCohort of 960 older adults

In a study that followed 960 adults aged 58 to 99 for an average of 4.7 years, those who ate the most green leafy vegetables, a median of 1.3 servings a day, had slower cognitive decline than those who ate the least, equal to being 11 years younger.22 Higher intakes of vitamin K, lutein, folate, nitrate, kaempferol and vitamin E were each tied to slower decline on their own.22 Other large studies point to the same pattern: higher green vegetable intake is linked with slower cognitive aging.12

5

Healthy blood pressure and arteries

Emerging evidenceHuman studyTrial of 18 adults · cohort of 1,226 women

Leafy greens sit at the top of my High Blood Pressure Protocol's food list, for their nitrates, magnesium and potassium.23 Crucifers have trial data. In an Australian trial of 18 adults with mildly raised blood pressure, mostly women in their late 60s, each person tried both diets, in random order and without being told which soup was being tested: 2 weeks of about 300 grams (10 ounces) a day of broccoli, kale, cauliflower and cabbage in soups, and 2 weeks of the same amount of potato, sweet potato, carrot and pumpkin, with a 2-week break in between. On the crucifers, 24-hour systolic blood pressure was 2.5 points lower (3.6 points lower during the day) in the 17 with complete readings, and triglycerides were about 18 mg/dL lower.24

Nitrate-rich vegetables have long-term data too. In 1,226 Australian women aged 70 to 85 followed for 15 years, each extra 29 milligrams a day of nitrate from vegetables (the average was 67) went with 21% lower risk of death from atherosclerotic heart and blood vessel disease, a link that weakened to 15%, too small to rule out chance, once overall diet quality was accounted for, and 13% lower risk of death from any cause.25

6

Cancer-protective potential

Moderate evidenceHuman studyReview of 12 cohort and 23 case-control studies

I consider crucifers powerful in reducing cancer risk.12 Broccoli has been studied the most. In a 2024 review of 12 studies that followed 699,482 people over time, those who ate more broccoli had 11% lower risk of cancer; in 23 studies comparing 12,929 people with cancer to 18,363 without, broccoli eaters had 36% lower odds, and the benefits for specific cancer sites showed up only in those comparison studies.26 In the review of 95 studies that followed people over time, cruciferous and green-yellow vegetables were both tied to lower total cancer risk.21 For the lab side of the story, see sulforaphane benefits.

Do non-starchy vegetables lower blood sugar?

Quick answer

Yes, especially when you eat them first. In a trial of 11 adults with type 2 diabetes who each ate the same meal both ways, blood sugar 1 hour after eating was 125.6 mg/dL when vegetables and protein came first and 199.4 mg/dL when the carbs came first, about 37% lower.4

My Insulin Resistance & Prediabetes protocol calls meal order one of its simplest tools: eating vegetables and protein first and carbohydrates last leads to a smaller blood-sugar rise than eating the same meal in the opposite order. Each meal includes 2 or more cups of non-starchy vegetables, eaten first.3

The clearest test comes from Weill Cornell. Eleven adults with type 2 diabetes, all taking metformin, ate the same 628-calorie meal twice, a week apart, so each person tried both orders. The meal was ciabatta bread and orange juice, grilled chicken, and a lettuce and tomato salad with steamed broccoli. Both visits started at nearly the same blood sugar before eating, 106.7 and 107.3 mg/dL. When they ate the vegetables and chicken first and the bread and juice 15 minutes later, their blood sugar was 28.6% lower at 30 minutes (112.0 against 156.8 mg/dL), 37.0% lower at 1 hour (125.6 against 199.4) and 16.8% lower at 2 hours (140.8 against 169.2) than when they ate the carbs first. Their insulin at 1 hour was about half as high (63.2 against 125.4 µIU/mL).4

Vegetables and protein first: lower blood sugar at every check after eating

Vegetables and protein first: lower blood sugar at every check after eating11 adults with type 2 diabetes · the same 628-calorie meal in two orders, a week apart. Before eating: Carbs first 106.7 mg/dL, Vegetables and protein first, carbs last 107.3 mg/dL; 30 min: Carbs first 156.8 mg/dL, Vegetables and protein first, carbs last 112 mg/dL; 1 hour: Carbs first 199.4 mg/dL, Vegetables and protein first, carbs last 125.6 mg/dL; 2 hours: Carbs first 169.2 mg/dL, Vegetables and protein first, carbs last 140.8 mg/dL11 adults with type 2 diabetes · the same 628-calorie mealin two orders, a week apart106.7156.8199.4169.2Carbs first (mg/dL)107.3112125.6140.8Vegetables and protein first, carbs last (mg/dL)Before eating30 min1 hour2 hours
Source: Shukla et al. · Diabetes Care, 2015 [4]Average blood sugar in mg/dL; each person ate both orders.

The same team then tested 15 adults with prediabetes, who ate one meal three ways on three days, in random order. Eating the vegetables first, or the protein and vegetables first, cut the peak rise in blood sugar by more than 40% compared with eating the carbs first, and blood sugar stayed steady instead of swinging; with protein and vegetables first, the total rise over the test was 38.8% smaller.19

A 2026 review pooled 18 randomized trials of eating vegetables before carbohydrates, in adults with and without health conditions. Thirty minutes after eating, blood sugar was about 22 mg/dL lower than after the comparison meals, and at 1 hour about 9 mg/dL lower, with insulin lower at both points; by 2 hours it ran about 4 mg/dL higher. In people with type 2 diabetes, individual studies showed HbA1c falling from 8.3% to 6.8% over 24 months. The reviewers rated the certainty of the evidence very low, since 8 of the 18 trials carried a high risk of bias.20

Which vegetables you choose matters as well. In the Australian soup study, 18 adults without diabetes wore glucose monitors through both 2-week diets. On the crucifers, their blood sugar swung less across the day (its variation was 2.0 percentage points lower) and rose less after meals, an effect that came mostly from dinner, though their average glucose over the whole day didn't differ.27

Over the long run, leafy greens stand out. My Type 2 Diabetes Protocol ranks them first among its top 10 foods, for their magnesium and fiber.2 In a 2010 review of studies that followed people over time, the four that tracked green leafy vegetables found 14% lower risk of type 2 diabetes with greater intake.46 A 2018 update that pooled 11 such studies, with 754,729 people, found a smaller link, 9% lower risk, just at the line researchers use to rule out chance.47

To put this to work, start each meal with the vegetables, then the protein, and save the starch for last. The Type 2 Diabetes Protocol adds one more step: finish with a 10 to 15 minute walk.2 For targets, see normal blood sugar levels, and for a full plan, the insulin resistance diet.

Three blood tests for how you handle carbohydrates

No single meal shows up on these tests. They show how your body is handling blood sugar over time.

  • HbA1c: A picture of your blood sugar across roughly the past three months.
  • Fasting insulin: How hard your body is working to keep blood sugar steady.
  • Fasting glucose: Your blood sugar after an overnight fast.

See the cellular bloodwork panel

Have results? Analyze them free →

How many servings of non-starchy vegetables should you eat a day?

Quick answer

Aim for at least 2 cups of non-starchy vegetables at every meal, about half your plate.32 That's well above the 3 servings of vegetables a day in the 2025–2030 Dietary Guidelines for a 2,000-calorie diet.28

The guidelines set a floor. The ADA suggests at least six servings of vegetables a day, where a serving is ½ cup cooked or 1 cup raw,11 which works out to 3 cups cooked or 6 cups raw. Most Americans fall short of even the old target: in 2019, only 10.0% of U.S. adults ate the 2 to 3 cups of vegetables a day that the 2020–2025 guidelines called for.29

Fiber is the other reason to fill the plate. The average person gets around 14 to 15 grams of fiber a day, and I want you to at least double that, to 30 grams or more.14 I'd aim for about 40 grams a day, 10 to 15 grams per meal, and you don't typically want to go over 50, since that can start to be too much.7 Vegetables make that easy: a cup of raw broccoli has 2.4 grams of fiber, a cup of jicama 6.4 and a medium artichoke 6.9.9 Inside your gut, bacteria ferment that fiber into short-chain fatty acids such as butyrate, which act as signals in your body and serve as an energy source.30 The healthier your gut, the healthier and younger your cells remain.12 For more, see how much fiber per day and high-fiber foods.

Here's what a day built this way can look like:

  • Breakfast: Eggs scrambled with spinach, peppers and mushrooms.

  • Lunch: A big salad of romaine, arugula and cucumber, or a plate of steamed vegetables, with wild-caught salmon and a small sweet potato eaten last.

  • Dinner: Steamed broccoli and cauliflower with olive oil and sea salt, sautéed zucchini, and chicken or fish.

  • Snack: Celery, radishes or jicama sticks with hummus.

How to cook non-starchy vegetables to keep their benefits

For cruciferous vegetables, I highly recommend steaming. I think it's the best: get a big vegetable steamer and steam big batches.7 Gentle cooking methods like steaming or sautéing can make certain nutrients more available, and lightly steamed crucifers are easier on the gut than raw ones.12 Lycopene in tomatoes becomes more available when they're cooked, and the beta-carotene in carrots and sweet potatoes is better absorbed after cooking with healthy fats.12 For more examples, see foods that are more nutritious cooked than raw.

Lab studies of broccoli back up the steamer. In one, steaming kept the most glucosinolates, vitamin C and chlorophyll of five home cooking methods.31 In another, steaming and microwaving caused no significant loss of glucosinolates in broccoli, Brussels sprouts, cauliflower and cabbage, while boiling did, and about 90% of what boiling took out ended up in the cooking water.32 So if you do boil vegetables, use the cooking water in a soup or sauce.

Steamed vegetables are simple to finish: a little sea salt, or olive oil and sea salt, or do what I do and dip them in hummus.33

How broccoli makes sulforaphane

Broccoli carries mostly glucoraphanin, the precursor, and sulforaphane forms as you prepare and eat it.18 You can influence each step.

1You chop or chew

Crucifers carry glucoraphanin, and cutting or chewing brings it into contact with myrosinase, an enzyme in the plant.34 As I put it on my show, "Chopping or chewing them releases something called sulforaphane, which switches on Nrf2."5

2Myrosinase makes sulforaphane

The enzyme turns glucoraphanin into sulforaphane. If the plant's enzyme is gone, the bacteria in your gut can still convert some of it.3435

3Heat decides how much forms

Short steaming or microwaving favors the conversion, while boiling and blanching cause the largest losses; freezing itself protects the glucoraphanin.36

4You can add the enzyme back

Mustard seed and daikon radish carry active myrosinase of their own, so a little of either on cooked or thawed broccoli restarts the process.3738

5Your cells respond

In lab research, sulforaphane is a potent switch for your cells' own protective enzymes, such as glutathione transferases.18 Sulforaphane does this by activating Nrf2, the switch that turns those defenses on.12

Fresh or frozen?

Both. My vegetable list says organic fresh or frozen vegetables are best,8 and the Dietary Guidelines call frozen vegetables with no or very limited added sugars good options too.28 The Dirty Dozen explains which produce is most worth buying organic.

Frozen broccoli needs one extra step to make the most sulforaphane. Freezing keeps its glucoraphanin,36 but the quick blanching before commercial freezing destroys myrosinase. In a study of 18 healthy adults who ate soups made from lightly cooked fresh or frozen broccoli, the frozen soup delivered about a tenth as much sulforaphane.35 Mustard powder puts the enzyme back. In a trial of 12 healthy adults who each ate 200 grams (about 7 ounces) of cooked broccoli twice, adding 1 gram of powdered brown mustard raised the sulforaphane their bodies absorbed more than fourfold, measured in their urine over the next 24 hours: 44.7 against 9.8 on the study's measure.37 In lab testing, a little raw daikon radish (0.25% by weight) added to frozen broccoli as it thawed let sulforaphane form without changing how the broccoli looked, and daikon still supported some sulforaphane formation after heating at 125°C (257°F) for 10 minutes.38 See frozen vs. fresh vegetables for more.

Mustard powder on cooked broccoli: more than four times the sulforaphane absorbed

Mustard powder on cooked broccoli: more than four times the sulforaphane absorbed12 healthy adults · 200 g cooked broccoli, with or without 1 g brown mustard powder · each person tried both. Cooked broccoli + mustard powder: 44.7 µmol/g creatinine; Cooked broccoli alone: 9.8 µmol/g creatinine12 healthy adults · 200 g cooked broccoli, with or without 1g brown mustard powder · each person tried both
44.7 µmol/g creatinine
COOKED BROCCOLI + MUSTARD POWDER
9.8 µmol/g creatinine
COOKED BROCCOLI ALONE
Source: Okunade et al. · Molecular Nutrition & Food Research, 2018 [37]Sulforaphane metabolite measured in 24-hour urine.

Add a healthy fat

Many of the colorful compounds in vegetables, such as lycopene, beta-carotene and lutein, need fat to be absorbed. In two studies of 11 healthy adults each, who ate the same meals with and without avocado, adding 150 grams of avocado to a salad raised beta-carotene absorption 15.3 times, alpha-carotene 7.2 times and lutein 5.1 times, and adding it to salsa raised lycopene absorption 4.4 times and beta-carotene 2.6 times; 24 grams of avocado oil worked as well as the fruit.39 Dress salads with extra virgin olive oil, add avocado, and cook your tomatoes and carrots with a little fat.

Non-starchy vegetables on keto and low-carb diets

On keto or any lower-carb plan, non-starchy vegetables should be the base of the plate. As the keto guide puts it, not eating enough vegetables is the biggest mistake of all, and the people who struggle on keto are usually the ones who drop vegetables.10 Keto is a tool, not a life sentence, so if your energy, sleep, cycle or thyroid feels off after a few weeks, cycle in some healthy carbs.10

Watercress, alfalfa sprouts, arugula, kale and spinach are among the lowest-carb picks, each with about a gram of carbohydrate or less per cup raw.9 For more, see low-carb vegetables and the keto diet food list.

Planning your vegetables for the week?

Ask Dr. Axe AI. Its answers draw on this library and show their sources.

Who should be careful with non-starchy vegetables?

Quick answer

Non-starchy vegetables are everyday foods for nearly everyone, with a few specific cautions: kidney stones, warfarin, SIBO and IBS, an underactive thyroid, joint pain with nightshades, kidney disease on a potassium limit, blood-sugar medication, raw sprouts for people at higher risk of food poisoning, and raising fiber too fast.12404148

Who needs extra care with these vegetables:
  • Kidney stones: Oxalates aren't harmful in small amounts, but overconsuming high-oxalate foods such as spinach and beets can contribute to stone formation in susceptible people, especially with poor gut health.12 Spinach and Swiss chard are nutrient-dense greens,42 but they're also among the highest-oxalate foods, so if you're prone to kidney stones, rotate in lower-oxalate greens and boil spinach and chard, which sends much of their oxalate into the cooking water.43 Drinking enough fluid matters most of all; the same review names low fluid intake as the major dietary risk factor.43

  • Warfarin: Leafy greens are rich in vitamin K, which affects how warfarin works. A review of 2 diet trials and 9 other studies found no support for cutting vitamin K when starting the drug, and suggested an effect may show only above about 150 micrograms a day; the better approach is to keep your intake steady and avoid big swings.40 Tell the doctor who manages your INR before you make a large change in how many greens you eat.

  • SIBO and IBS: Onion and garlic feed fermentation, so my SIBO Protocol limits them for now, uses garlic-infused olive oil for flavor, and brings foods back one at a time, garlic first, then onion, watching three days for symptoms.41 See FODMAPs for more.

  • Underactive thyroid: My Hypothyroidism Protocol favors warm, cooked meals, cooks cruciferous vegetables to deactivate their goitrogens, and puts excess raw cruciferous smoothies on its avoid list.44

  • Nightshades and joint pain: Most people do fine with tomatoes, peppers and eggplant. If joint pain persists, a 3-week trial without them will tell you whether they matter for you.13

  • Kidney disease on a potassium limit: Cooked greens are concentrated sources of potassium; half a cup of boiled spinach has 419 milligrams.9 If your care team has set a potassium limit, plan your vegetables within it.

  • Blood-sugar medication: If you take insulin or another drug that lowers blood sugar, eating this way can lower your readings, so let the doctor who prescribes it know, since doses sometimes need adjusting as blood sugar improves.

  • Raw sprouts: Sprouts grow in warm, humid conditions that suit bacteria too, so the U.S. Food and Drug Administration advises young children, older adults, pregnant women and anyone with a weakened immune system to skip raw or lightly cooked sprouts and eat them cooked through.48

  • Raising fiber: If you eat few vegetables now, add them gradually, and keep total fiber under about 50 grams a day.7

The bottom line

Why non-starchy vegetables belong at the center of your plate

Filling half your plate with non-starchy vegetables is one of the simplest, most nourishing habits you can build into every meal. They bring fiber, minerals and protective plant compounds for very few carbs, and eaten first, they help steady the blood-sugar rise from the rest of the meal. My philosophy has always been to use food as medicine first,45 and few foods do that job as well as a plate that's half vegetables. The blood-sugar effect has been tested directly in trials, and large studies that followed people for years tie these vegetables to a longer life, a healthier weight and a sharper brain.

Fill half your plate, at least 2 cups per meal, eat them before the starch, steam your crucifers, add a healthy fat, and rotate through 20 to 30 different plants a week. The free Insulin Resistance & Prediabetes protocol builds these habits into a 90-day plan, and if you have recent labs, analyze your bloodwork free →

Fill your plate with color first, and you give your body what it needs to heal and renew itself, one meal at a time.

Non-starchy vegetables: frequently asked questions

What are non-starchy vegetables?

They're vegetables with about 5 grams of carbohydrate or less per serving of ½ cup cooked or 1 cup raw, such as leafy greens, broccoli, cauliflower, peppers, tomatoes, zucchini, mushrooms, asparagus and green beans.1

What is the difference between starchy and non-starchy vegetables?

Carbohydrate: a serving of a starchy vegetable carries about 15 grams and a serving of a non-starchy one about 5.1 Non-starchy vegetables fill half your plate, and starchy ones fit in the last quarter, after your vegetables and protein.2

Are carrots starchy or non-starchy?

I group carrots with the starchy vegetables, though the American Diabetes Association lists them as non-starchy.1211 Half a cup of boiled carrots has 6.4 grams of carbohydrate, between a leafy green and a potato.9

Are beets a starchy vegetable?

I group beets with the starchy vegetables, though the American Diabetes Association lists them as non-starchy.1211 Half a cup of boiled beets has 8.5 grams of carbohydrate and 1.7 grams of fiber.9

Is squash a starchy vegetable?

It depends on the kind: summer squash is non-starchy, and winter squash such as butternut and acorn is starchy.111 A cup of raw zucchini has 3.9 grams of carbohydrate and a cup of raw yellow squash 4.9, while half a cup of baked butternut squash has 10.8 and acorn squash 15.0.9 Spaghetti squash, a winter squash, is on the American Diabetes Association's non-starchy list, at 5.0 grams per half cup cooked.119

Are tomatoes a non-starchy vegetable?

Yes. A cup of raw tomatoes has 7.0 grams of carbohydrate and 2.2 grams of fiber, and the American Diabetes Association lists them as non-starchy.911 Cooking them makes their lycopene more available.12

Is corn a starchy vegetable?

Yes. Half a cup of boiled sweet corn has 15.6 grams of carbohydrate, the amount of a starchy serving.91 My vegetable list includes corn when it's organic.8

Are mushrooms non-starchy vegetables?

Yes. A cup of raw white mushrooms has 2.3 grams of carbohydrate, and the American Diabetes Association counts mushrooms as non-starchy.911

Which vegetables don't spike blood sugar?

Non-starchy vegetables raise blood sugar very little, and leafy greens are the lowest, with 2 grams of carbohydrate or less in a cup of most raw greens.19 In a trial of 11 adults with type 2 diabetes and a review of 18 trials, eating them before the carbs made the meal's rise in blood sugar smaller in the first hour.420

How many servings of non-starchy vegetables should I eat a day?

At least 2 cups at every meal, about half your plate.32 The American Diabetes Association suggests at least six servings of vegetables a day, where a serving is ½ cup cooked or 1 cup raw.11

What are the healthiest non-starchy vegetables?

Broccoli sprouts and watercress top my list, with cruciferous vegetables such as kale, cabbage, Brussels sprouts, broccoli and cauliflower close behind.56 Variety matters too, so aim for 20 to 30 different plants a week.14

Are frozen vegetables as good as fresh?

Yes. My vegetable list says organic fresh or frozen vegetables are best, and the Dietary Guidelines call frozen vegetables good options.828 For frozen broccoli, add a little mustard powder or raw daikon radish to restore the enzyme that makes sulforaphane.3738

Can you eat non-starchy vegetables on keto?

Yes. They should be the base of a keto plate, since their fiber means they barely count against your carb budget.10

Is a banana a starchy vegetable?

No, a banana is a fruit. Its starchy cooking cousin, the plantain, is used like a starchy vegetable: half a cup of boiled green plantain has 20.0 grams of carbohydrate.9

Should you avoid starchy vegetables?

No. Whole starchy vegetables are good carbs; eat them in the last quarter of your plate, after your vegetables and protein.2 Cooked and cooled potatoes give you resistant starch, which supports butyrate production in your gut.14

Can you eat too many non-starchy vegetables?

For most people, no, as long as you raise them gradually and keep total fiber under about 50 grams a day.7 If you're prone to kidney stones, take warfarin or have SIBO, read the safety section first.

Freshness & method note

October 9, 2026 — Trimmed repeated book references.

October 6, 2026 — Matched Dr. Axe's quotes to his own words, with their sources.

October 4, 2026 — Rebuilt the page around the complete list, grouped by vegetable family, with carbohydrate and fiber per serving for 49 vegetables from USDA FoodData Central and a link to each vegetable's DrAxe.com page. Moved carrots, beets and pumpkin to the starchy vegetables list, following Dr. Axe's classification in Heal Your Cells, and noted that the American Diabetes Association lists carrots and beets as non-starchy. Replaced general benefit claims with referenced research graded by evidence, including the eating-order trials and a 2026 review of 18 trials, and added Dr. Axe's plate and serving guidance (at least 2 cups per meal), a cooking section on sulforaphane with the mustard-powder trial, three charts, a step diagram and a safety section. Corrected the artichoke fiber figure to 6.9 grams in a medium raw artichoke, and noted that some non-starchy vegetables, such as onions and leeks, carry more than 5 grams of carbohydrate per serving.

October 4, 2026 (second update) — Added Dr. Axe's Type 2 Diabetes Protocol ranking of leafy greens with the long-term research on leafy greens and type 2 diabetes, a raw-sprouts note to the safety section, and FAQs on beets and squash. Described the Australian soup trial's random order, the daikon lab result and the 2026 meal-order review's first-hour finding more precisely, noted that the nitrate link became too small to rule out chance after adjusting for diet quality, named glucoraphanin as the glucosinolate that becomes sulforaphane, took kale out of the high-oxalate examples (kale is low in oxalate), converted lab units to mg/dL, and added the web address for reference 42.

References

  1. American Diabetes Association Nutrition & Wellness Team. Let's Talk About Vegetables. Diabetes Food Hub. April 29, 2025.
  2. Axe J. The Type 2 Diabetes Protocol. DrAxe.com. 2026. p. 15, "T2D Foods · Ranked" and "The Blood-Sugar-First Plate."
  3. Axe J. Insulin Resistance & Prediabetes: The 90-Day Healing Protocol. DrAxe.com. 2026. pp. 12, 16 and 22.
  4. Shukla AP, Iliescu RG, Thomas CE, Aronne LJ. Food Order Has a Significant Impact on Postprandial Glucose and Insulin Levels. Diabetes Care. 2015;38(7):e98-9. doi:10.2337/dc15-0429. PMID:26106234
  5. Axe J. 7 Foods That Quiet Inflammation Better Than Supplements. The Dr. Josh Axe Show. 2026 (Dr. Axe at 16:02–16:27 and 16:59–17:12; YouTube upload titled "How to Reduce Chronic Inflammation Naturally," https://www.youtube.com/watch?v=JFeUM50IzBI).
  6. Axe J. Your Body Makes Its Own Master Antioxidant — Here's Why It Stops. The Dr. Josh Axe Show. 2026 (Dr. Axe at 30:56 to 31:26; YouTube 7PSNoeU9OFQ).
  7. Axe J. How to Prevent CANCER: 15 Proven Ways to Lower Your Risk. The Dr. Josh Axe Show. 2026 (Dr. Axe at 17:11 to 17:40 and 19:32; YouTube Gsw5UuDlHDY).
  8. Axe J, Rubin J. The Biblio Diet. Hachette Book Group; 2025. ISBN 9781546008439. Food lists, "Vegetables (organic fresh or frozen are best)."
  9. U.S. Department of Agriculture, Agricultural Research Service. FoodData Central, SR Legacy (2019): carbohydrate (by difference), total dietary fiber and potassium for raw and cooked vegetables, per serving computed from each record's per-100-gram values and its own cup or piece weight. FDC IDs 168462, 168463, 168421, 169387, 169991, 169247, 170406, 169256, 170061, 170068, 168412, 168564, 170375, 168385, 170379, 169967, 169986, 170397, 170383, 169971, 169975, 169977, 170390, 168424, 169276, 168451, 170465, 170457, 170108, 170427, 169228, 168409, 169291, 168464, 169299, 170402, 169260, 168389, 169988, 169205, 168569, 169210, 169961, 169141, 170010, 169246, 169385, 170000, 169251, 170073, 170066, 169957, 168384, 168454, 170393, 170394, 169145, 169146, 168449, 169296, 169293, 170420, 169999, 170438, 170093, 168483, 170009, 170072, 168486, 168216. Accessed October 4, 2026.
  10. Axe J. Keto Diet: Benefits, Food List, 7-Day Meal Plan & How to Start (A Doctor's Guide). DrAxe.com. 2026.
  11. American Diabetes Association. Non-Starchy Vegetables for Blood Glucose Control. Accessed October 4, 2026.
  12. Axe J, Cole W. Heal Your Cells. Avery; 2026. ISBN 9798217181353. "Deficient by Design," pp. 81 and 83; "Personalized Nutrition for Cellular Healing," p. 135; the gut-microbiome section ("The healthier your gut, the healthier and younger your cells remain").
  13. Axe J. The Anti-Inflammatory Reset: The 30-Day Healing Protocol. DrAxe.com. 2026 (p. 26, FAQ, "What about nightshades?").
  14. Axe J. The Shocking Reason Your Anxiety, Brain Fog & Bloating May Start in Your Gut. The Dr. Josh Axe Show. 2026 (Dr. Axe at 36:27, 37:23, 37:52 and 38:48; YouTube yumJczZ1_JM).
  15. Axe J. Burn Fat, Build Muscle, Live a LOT Longer. The Dr. Josh Axe Show. 2026 (Dr. Axe at 25:42 and 26:11; YouTube PKpftccZnv4).
  16. Wang DD, Li Y, Bhupathiraju SN, Rosner BA, Sun Q, Giovannucci EL, et al. Fruit and Vegetable Intake and Mortality: Results From 2 Prospective Cohort Studies of US Men and Women and a Meta-Analysis of 26 Cohort Studies. Circulation. 2021;143(17):1642-1654. doi:10.1161/CIRCULATIONAHA.120.048996. PMID:33641343
  17. Bertoia ML, Mukamal KJ, Cahill LE, Hou T, Ludwig DS, Mozaffarian D, et al. Changes in Intake of Fruits and Vegetables and Weight Change in United States Men and Women Followed for Up to 24 Years: Analysis from Three Prospective Cohort Studies. PLoS Med. 2015;12(9):e1001878. doi:10.1371/journal.pmed.1001878. PMID:26394033
  18. Fahey JW, Zhang Y, Talalay P. Broccoli sprouts: an exceptionally rich source of inducers of enzymes that protect against chemical carcinogens. Proc Natl Acad Sci U S A. 1997;94(19):10367-72. doi:10.1073/pnas.94.19.10367. PMID:9294217
  19. Shukla AP, Dickison M, Coughlin N, Karan A, Mauer E, Truong W, et al. The impact of food order on postprandial glycaemic excursions in prediabetes. Diabetes Obes Metab. 2019;21(2):377-381. doi:10.1111/dom.13503. PMID:30101510
  20. Kampmann-Gongoll K, Schlesinger S, Noreik M, Kuss O, Lang A. Effect of eating vegetables before carbohydrates on glucose, insulin and glycemic control - A systematic review and meta-analysis of randomized controlled trials. Clin Nutr. 2026;66:106775. doi:10.1016/j.clnu.2026.106775. PMID:42748597
  21. Aune D, Giovannucci E, Boffetta P, Fadnes LT, Keum N, Norat T, et al. Fruit and vegetable intake and the risk of cardiovascular disease, total cancer and all-cause mortality-a systematic review and dose-response meta-analysis of prospective studies. Int J Epidemiol. 2017;46(3):1029-1056. doi:10.1093/ije/dyw319. PMID:28338764
  22. Morris MC, Wang Y, Barnes LL, Bennett DA, Dawson-Hughes B, Booth SL. Nutrients and bioactives in green leafy vegetables and cognitive decline: Prospective study. Neurology. 2018;90(3):e214-e222. doi:10.1212/WNL.0000000000004815. PMID:29263222
  23. Axe J. The High Blood Pressure Protocol. DrAxe.com. 2026. p. 15, "13 Blood-Pressure Foods · Ranked."
  24. Connolly EL, Liu AH, Radavelli-Bagatini S, Shafaei A, Boyce MC, Wood LG, et al. Cruciferous vegetables lower blood pressure in adults with mildly elevated blood pressure in a randomized, controlled, crossover trial: the VEgetableS for vaScular hEaLth (VESSEL) study. BMC Med. 2024;22(1):353. doi:10.1186/s12916-024-03577-8. PMID:39218859
  25. Blekkenhorst LC, Bondonno CP, Lewis JR, Devine A, Woodman RJ, Croft KD, et al. Association of dietary nitrate with atherosclerotic vascular disease mortality: a prospective cohort study of older adult women. Am J Clin Nutr. 2017;106(1):207-216. doi:10.3945/ajcn.116.146761. PMID:28566306
  26. Baladia E, Moñino M, Pleguezuelos E, Russolillo G, Garnacho-Castaño MV. Broccoli Consumption and Risk of Cancer: An Updated Systematic Review and Meta-Analysis of Observational Studies. Nutrients. 2024;16(11):1583. doi:10.3390/nu16111583. PMID:38892516
  27. Connolly EL, Liu AH, Woodman RJ, Shafaei A, Wood LG, Mithen R, et al. Cruciferous vegetables improve glycaemic control compared to root/squash vegetables in a randomized, controlled, crossover trial: The VEgetableS for vaScular hEaLth (VESSEL) study. Diabetes Obes Metab. 2025;27(8):4300-4310. doi:10.1111/dom.16467. PMID:40375391
  28. U.S. Department of Agriculture and U.S. Department of Health and Human Services. Dietary Guidelines for Americans, 2025–2030. January 2026. p. 3, "Eat Vegetables & Fruits Throughout the Day."
  29. Lee SH, Moore LV, Park S, Harris DM, Blanck HM. Adults Meeting Fruit and Vegetable Intake Recommendations - United States, 2019. MMWR Morb Mortal Wkly Rep. 2022;71(1):1-9. doi:10.15585/mmwr.mm7101a1. PMID:34990439
  30. Koh A, De Vadder F, Kovatcheva-Datchary P, Bäckhed F. From Dietary Fiber to Host Physiology: Short-Chain Fatty Acids as Key Bacterial Metabolites. Cell. 2016;165(6):1332-1345. doi:10.1016/j.cell.2016.05.041. PMID:27259147
  31. Yuan GF, Sun B, Yuan J, Wang QM. Effects of different cooking methods on health-promoting compounds of broccoli. J Zhejiang Univ Sci B. 2009;10(8):580-8. doi:10.1631/jzus.B0920051. PMID:19650196
  32. Song L, Thornalley PJ. Effect of storage, processing and cooking on glucosinolate content of Brassica vegetables. Food Chem Toxicol. 2007;45(2):216-24. doi:10.1016/j.fct.2006.07.021. PMID:17011103
  33. Axe J. If You Do One Detox a Year — Do It Now, And Here's How. The Dr. Josh Axe Show. 2025 (Dr. Axe at 19:29 and 19:56; YouTube b9uN39KCW24).
  34. Yagishita Y, Fahey JW, Dinkova-Kostova AT, Kensler TW. Broccoli or Sulforaphane: Is It the Source or Dose That Matters? Molecules. 2019;24(19):3593. doi:10.3390/molecules24193593. PMID:31590459
  35. Saha S, Hollands W, Teucher B, Needs PW, Narbad A, Ortori CA, et al. Isothiocyanate concentrations and interconversion of sulforaphane to erucin in human subjects after consumption of commercial frozen broccoli compared to fresh broccoli. Mol Nutr Food Res. 2012;56(12):1906-16. doi:10.1002/mnfr.201200225. PMID:23109475
  36. Sun J, Wang Y, Pang X, Tian S, Hu Q, Li X, et al. The effect of processing and cooking on glucoraphanin and sulforaphane in brassica vegetables. Food Chem. 2021;360:130007. doi:10.1016/j.foodchem.2021.130007. PMID:33993075
  37. Okunade O, Niranjan K, Ghawi SK, Kuhnle G, Methven L. Supplementation of the Diet by Exogenous Myrosinase via Mustard Seeds to Increase the Bioavailability of Sulforaphane in Healthy Human Subjects after the Consumption of Cooked Broccoli. Mol Nutr Food Res. 2018;62(18):e1700980. doi:10.1002/mnfr.201700980. PMID:29806738
  38. Dosz EB, Jeffery EH. Modifying the processing and handling of frozen broccoli for increased sulforaphane formation. J Food Sci. 2013;78(9):H1459-63. doi:10.1111/1750-3841.12221. PMID:23915112
  39. Unlu NZ, Bohn T, Clinton SK, Schwartz SJ. Carotenoid absorption from salad and salsa by humans is enhanced by the addition of avocado or avocado oil. J Nutr. 2005;135(3):431-6. doi:10.1093/jn/135.3.431. PMID:15735074
  40. Violi F, Lip GY, Pignatelli P, Pastori D. Interaction Between Dietary Vitamin K Intake and Anticoagulation by Vitamin K Antagonists: Is It Really True?: A Systematic Review. Medicine (Baltimore). 2016;95(10):e2895. doi:10.1097/MD.0000000000002895. PMID:26962786
  41. Axe J. SIBO Protocol: The 60-Day Healing Protocol. DrAxe.com. 2026 (pp. 16, 18 and 22).
  42. Top 20 Nutrient-Dense Foods and Their Benefits. DrAxe.com. 2024 ("19. Spinach"; "Other nutrient-dense foods include": "Swiss chard").
  43. Siener R. Nutrition and Kidney Stone Disease. Nutrients. 2021;13(6):1917. doi:10.3390/nu13061917. PMID:34204863
  44. Axe J. The Hypothyroidism Protocol. DrAxe.com. 2026. Foods That Heal & Foods That Harm, "The Warm-Foods Principle" (p. 17).
  45. Axe J. #1 Cellular Health EXPERT: Most Longevity Advice Gets It Backwards. The Dr. Josh Axe Show. March 19, 2026 (at 4:06).
  46. Carter P, Gray LJ, Troughton J, Khunti K, Davies MJ. Fruit and vegetable intake and incidence of type 2 diabetes mellitus: systematic review and meta-analysis. BMJ. 2010;341:c4229. doi:10.1136/bmj.c4229. PMID:20724400
  47. Chen GC, Koh WP, Yuan JM, Qin LQ, van Dam RM. Green leafy and cruciferous vegetable consumption and risk of type 2 diabetes: results from the Singapore Chinese Health Study and meta-analysis. Br J Nutr. 2018;119(9):1057-1067. doi:10.1017/S0007114518000119. PMID:29457582
  48. U.S. Food and Drug Administration. Selecting and Serving Produce Safely. Content current as of March 5, 2024.
Dr. Josh Axe

Dr. Josh Axe, DC, DNM, CNS

Doctor of Natural Medicine · Founder, DrAxe.com

Dr. Axe is a certified doctor of natural medicine, clinical nutritionist, and multiple New York Times bestselling author. He has spent 20+ years in clinical practice helping people heal at the root cause and founded one of the most-visited natural-health platforms in the world.

Read the full bio →

This article is for educational purposes. See our medical disclaimer.