Supplements · Plant compounds

Theobromine: Benefits, vs. Caffeine, Dosage & Side Effects

Q: Does theobromine keep you awake?

Theobromine lingers, with a half-life of about 7 hours,[34] and chocolate carries some caffeine too. As Dr. Axe has said on his show, a square of dark chocolate in the evening probably won't bother you much, but half a bar carries enough caffeine to affect your sleep signals.[33] If you're sensitive, enjoy larger amounts earlier in the day.

What theobromine is, how much of it dark chocolate and cocoa supply, what the human research shows for HDL cholesterol, blood flow, cough and mood, how it compares with caffeine, and why cacao comes before the capsule.

By Dr. Josh Axe, DC, DNM, CNS·24-min read

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Evidence-based47 sources citedUpdated October 9, 2026

Published Oct 1, 2026Last updated Oct 13, 2026Editorial policyMedical review policyFact-checking policy

Theobromine is the main natural stimulant in cacao beans and in the cocoa powder and dark chocolate made from them.

The Dr. Axe Score™

5.6/10

Overall Dr. Axe Score · Theobromine

This score rates theobromine taken on its own as a supplement.

Scientific Evidence

4.8/10

About a dozen human trials of theobromine alone or added to cocoa, the largest with 289 people, from single doses to 12 weeks; no pooled analysis yet.

Bioavailability & Absorption

7.2/10

Taken up by mouth in step with the dose, peaking in the blood in 2 to 3 hours; a half-life of about 7 hours; in cocoa, it raises blood levels of cacao's flavanols.

Clinical Effectiveness

4.2/10

Our judgment: a modest HDL effect, mixed results for arteries and blood pressure, and no clear gain yet for cough or mood from the capsule alone.

Safety & Tolerability

6.6/10

Well tolerated at food amounts. At supplement doses, headache, nausea and heart rate rise with the dose, and two trials saw higher after-meal blood sugar or 24-hour blood pressure.

Why this score?

Why Theobromine scores 5.6 / 10

How the score works: Scientific Evidence rates the amount and quality of human, animal and lab research; Bioavailability & Absorption rates how well your body takes up and uses it; Clinical Effectiveness is the team's judgment of real-world usefulness, informed by the cited human studies, traditional use and Dr. Axe's published teaching on cacao; Safety & Tolerability weighs real harms by how serious and how common they are. These are editorial judgments, not validated clinical measurements.
Interaction check: Moderate for supplements, Low for chocolate at food amounts; the details are in the side effects section. Interactions are rated separately and don't change the score.
Weighting: Evidence 30% · Bioavailability & Absorption 25% · Clinical Effectiveness 25% · Safety & Tolerability 20% (4.8×0.30 + 7.2×0.25 + 4.2×0.25 + 6.6×0.20 = 5.61, shown as 5.6).

It earns its points from uptake by mouth that tracks the dose, higher HDL cholesterol in two placebo-controlled trials and good tolerance at modest doses, and it would climb with longer trials that show a clinical benefit. The whole foods it comes from, cacao and dark chocolate, add flavanols, magnesium and fiber to the theobromine.

A transparent, weighted index built for supplements. See how it’s calculated →

Interaction check: Moderate for theobromine supplements; Low for chocolate and cacao at food amounts. Theobromine is a methylxanthine, the same family as the prescription drugs theophylline and aminophylline, and methylxanthines interfere with regadenoson, a drug used in cardiac stress tests.13 14 The list below says what to do.

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Theobromine at a glance

Theobromine is the gentle, slow-acting stimulant in cacao, and cocoa powder and dark chocolate are its richest foods.1 An ounce of 70% to 85% dark chocolate carries about 227 milligrams, and a tablespoon of unsweetened cocoa powder about 111.2 3

HDL cholesterol: in a trial of 152 adults, 850 mg of added theobromine a day raised HDL by about 6 mg/dL over four weeks4
Inside cacao: in a study in which 10 volunteers tried each drink in turn, cocoa's methylxanthines, mostly theobromine, raised peak blood levels of cacao's flavanols by 21%5
Vs. caffeine: an ounce of 70% to 85% dark chocolate carries about ten times more theobromine than caffeine, and theobromine lasts longer, with a half-life of about 7 hours against about 42 34
Uric acid: in 20 healthy volunteers, dark chocolate at breakfast and dinner lowered uric acid crystallization in overnight urine27

Dark chocolate is one of the foods in the free Mitochondrial Longevity Protocol.

Open a fresh cacao pod and you'll find slightly bitter seeds wrapped in fruit with a sweet, citrusy taste.6 Those seeds become cacao nibs, cocoa and chocolate, and they carry theobromine, which, together with a little caffeine, gives chocolate its gentle lift.7 Researchers think it's also behind several of the other effects people have long credited to cocoa.1

I recommend a small daily amount of dark chocolate, 85% cacao or higher, one to two squares, along with raw organic cacao,6 for the flavanols that support blood flow and your mitochondria.8 Every one of those squares brings theobromine with it, and theobromine helps those flavanols get absorbed, a small example of a principle Dr. Will Cole and I lay out in Heal Your Cells: a whole food does more for you than any one of its parts.9

Researchers have also tested theobromine on its own, as a supplement, and found a modest rise in HDL cholesterol and early benefits for arteries and airways. That capsule research isn't strong enough yet to recommend theobromine supplements, so cacao and dark chocolate come first.

A whole food isn't one compound. It's hundreds of compounds arriving together in the ratios that nature and God created them to be in to best benefit our bodies.Dr. Josh Axe, DC, DNM, CNSFrom 7 Foods That Quiet Inflammation Better Than Supplements, The Dr. Josh Axe Show (2026), at 5:20

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Did you know?

Your body turns about 12% of the caffeine you drink into theobromine, so coffee drinkers make a little of their own.10
Despite its name, theobromine contains no bromine. Chemists call it 3,7-dimethylxanthine, a close relative of caffeine, which is 1,3,7-trimethylxanthine.11 The cacao tree it comes from is Theobroma cacao, a name that means "food of the gods."44
White chocolate carries almost none: about 0.04 milligrams of theobromine and caffeine combined per gram, against about 8 milligrams of theobromine per gram in 70% to 85% dark chocolate.12 2

What is theobromine?

Quick answer

Theobromine is a natural compound in the methylxanthine family, the same family as caffeine, and cacao beans are its richest source. Caffeine and theobromine are the two most abundant methylxanthines in cacao, and theobromine is present in higher amounts.13 1 It works mainly by blocking adenosine receptors and by inhibiting enzymes called phosphodiesterases.1

You'll meet theobromine in three forms. Most people get it from food: cocoa powder, cacao nibs and dark chocolate, with smaller amounts in milk chocolate.15 It's also sold as a powder and in capsules, the form used in several of the trials below, and in South Korea it has been approved for persistent cough since 2009.16

Once you swallow it, the more you take, the more reaches your system: in one controlled study of 24 young men, theobromine levels in saliva rose step by step as the dose went up,17 and it peaks in the blood about 2 to 3 hours after you take it.11 It then stays with you for hours, as the how-it-works section below shows.

A short history of cacao

Cocoa began in the Americas, and by the mid-1500s it had spread to Europe, where chocolate was enjoyed as a pleasure and valued as a good nutrient and even a medicine.1 In The Biblio Diet, Jordan Rubin and I note that the fruit of the cacao tree has been respected throughout history, and that cacao has been used to treat anemia, mental fatigue, fever, gout, kidney stone symptoms and even low libido.6

Gout and one type of kidney stone both involve uric acid crystals, and uric acid stones are where modern researchers have found some of theobromine's most interesting effects, covered in the benefits below.10

How much theobromine is in chocolate and cacao?

Quick answer

Unsweetened cocoa powder is the richest everyday source, with about 111 milligrams of theobromine in a tablespoon, and an ounce of 70% to 85% dark chocolate carries about 227 milligrams. The darker the chocolate, the more theobromine: an ounce of milk chocolate has about 58 milligrams.3 2 15

Values from USDA FoodData Central (SR Legacy). Per-serving amounts are calculated from the per-100-gram values: an ounce is 28.35 grams, and a tablespoon of cocoa powder weighs 5.4 grams.3 2 18 19 15

Food	Serving	Theobromine	Caffeine	Magnesium	Theobromine per 100 g
Cocoa powder, unsweetened	1 tablespoon (5.4 g)	111 mg	12 mg	27 mg	2,057 mg3
Dark chocolate, 70% to 85% cacao	1 ounce (28.35 g)	227 mg	23 mg	65 mg	802 mg2
Dark chocolate, 60% to 69% cacao	1 ounce	179 mg	24 mg	50 mg	632 mg18
Dark chocolate, 45% to 59% cacao	1 ounce	140 mg	12 mg	41 mg	493 mg19
Milk chocolate	1 ounce	58 mg	6 mg	18 mg	205 mg15

Theobromine per 100 grams: cocoa powder leads, and darker chocolate carries more

Source: USDA FoodData Central (SR Legacy): cocoa powder, FDC 169593; dark chocolate 70% to 85%, FDC 170273; 60% to 69%, FDC 170272; 45% to 59%, FDC 170271; milk chocolate, FDC 167587 [3]Milligrams of theobromine in 100 grams of each food. A longer bar means more theobromine.

In everyday terms, a tablespoon of cocoa powder stirred into a warm drink or a smoothie gives you about as much theobromine as half an ounce of 70% to 85% dark chocolate, for about 12 calories.3 Cacao also brings minerals along with its theobromine. As I said on my show, "The great thing about something like dark chocolate, it's got magnesium but it also has antioxidants."20 An ounce of 70% to 85% dark chocolate supplies about 65 milligrams of magnesium, and cocoa powder is richer still by weight, with 499 milligrams per 100 grams.2 3

What is theobromine good for?

Quick answer

Theobromine's best human evidence is for raising HDL cholesterol: in placebo-controlled trials, 450 milligrams a day raised it over 12 weeks and 850 milligrams over four.4 21 Inside cacao, it helps flavanols reach your blood, and studies point to benefits for arteries, uric acid kidney stones and healthy aging.5 23 24 25

Where the research stands

We found about a dozen human trials of theobromine given on its own or added to cocoa, the largest with 289 people, lasting from a single dose to 12 weeks, and no pooled analysis of them yet. Several tested doses well above what a serving of chocolate supplies, so every result below names the product and amount studied, and findings on cacao itself are labeled as cacao. Food and pharmaceutical companies ran or funded several of these trials.

Theobromine benefits, graded by evidence (updated October 2026). Evidence labels are editorial judgments that compare these uses with each other; they aren't formal certainty ratings.
Use	Evidence	Product studied	What the research shows
Higher HDL cholesterol	Moderate	Theobromine, 450 to 850 mg a day, 4 to 12 weeks	HDL up about 6 mg/dL in 152 adults and 1.72 mg/dL in 80; LDL and apoB down in the 152- and 44-person trials4 21 22
Helping cacao's flavanols	Emerging	Cocoa flavanols with cocoa methylxanthines	Peak blood levels of flavanol metabolites up 21%;5 a bigger boost to artery function than flavanols alone26
Uric acid kidney stones	Emerging	Citrate tablets with theobromine; dark chocolate	High-risk urine in 38.3% on citrate with theobromine and 44.7% on citrate alone, down from 63.8%; less crystallization after dark chocolate24 27
Healthy aging and gums	Emerging	Theobromine levels in blood or saliva	Linked with slower epigenetic aging, and with healthier gums over 7 to 10 years25 28
Arteries and blood pressure	Mixed	Theobromine, single doses or up to 979 mg a day for 3 to 4 weeks	Less arterial stiffness and lower central pressure; 24-hour pressure rose at the highest dose23 29 30
Cough and airways	Mixed	Theobromine capsules, 600 mg a day in the persistent-cough trial; 40 g dark chocolate	Induced cough calmed; persistent-cough scores improved slightly more than on placebo; stronger morning airflow in night owls31 16 32
Mood and alertness	Mixed	Theobromine alone, or with the caffeine in chocolate	With chocolate's caffeine, the same lift as cocoa; quieter effects on its own7 17 11

How does theobromine work in your body?

Theobromine arrives with cacao's flavanols, helps them in, eases your brain's slow-down signal more gently than caffeine, and then leaves through your kidneys.

1It arrives with cacao

Dark chocolate of 70% to 85% cacao carries roughly ten times as much theobromine as caffeine, together with cacao's flavanols.2

2It helps the flavanols in

Taken together with flavanols, cacao's methylxanthines, mostly theobromine, raise the amount that reaches your blood, and the flavanols then do more for your blood vessels. The numbers are in the second benefit below.5 26

3It eases the adenosine brake, gently

Acting on adenosine receptors in the brain, methylxanthines raise arousal, mood and concentration.13 Theobromine blocks the same receptors caffeine does, with two to three times weaker binding, so its lift is milder.11

4It acts on smooth muscle (proposed)

It also inhibits phosphodiesterase enzymes, its other main mechanism,1 which researchers propose explains its effects on airways and blood vessels. In lab tissue, it quieted the human vagus nerve signal that sets off a cough.31

5It lingers, then leaves through the kidneys

In a study of six healthy men, its half-life was about 7 hours, against about 4 for caffeine.34 About 20% leaves your body unchanged in urine,10 where, in lab tests, it slows uric acid crystals from forming.35

Theobromine benefits, ranked by evidence

Ordered by how strong the human research is, theobromine's benefits start with HDL cholesterol and its role helping cacao's flavanols, followed by uric acid kidney stones and healthy aging, with mixed results for arteries and blood pressure, cough and airways, and mood.

Higher HDL cholesterol

Moderate evidenceHuman study3 RCTs · 44 to 152 adults · 4 to 12 weeks

In placebo-controlled trials, 450 and 850 mg of theobromine a day raised HDL cholesterol, the protective kind, and LDL fell at 850 mg and again in a third trial at 500 mg a day.4 21 22 The full picture is in the HDL section below.

Study takeaway: theobromine raised HDL cholesterol at 450 and 850 mg a day and lowered LDL in two trials.

Helping cacao's flavanols work

Emerging evidenceHuman studyControlled studies · 47 and 10 healthy volunteers

Cacao's heart benefits are usually credited to its flavanols, and theobromine helps them. In four randomized studies with 47 healthy volunteers, drinks with cocoa flavanols improved flow-mediated dilation, a measure of how well arteries widen, and the improvement was greater when cocoa's methylxanthines were added; the methylxanthines alone didn't significantly change it. Artery stiffness and diastolic blood pressure fell more with the pair too, and more of the flavanols reached the blood.26 In a study in which 10 volunteers tried each drink in turn, cocoa methylxanthines, mostly theobromine, raised peak blood levels of flavanol metabolites by 21%, while caffeine alone raised them 10%, a change that wasn't statistically significant.5 In the food matrix, the parts of cacao help each other.

Study takeaway: cocoa's methylxanthines raised peak blood levels of flavanol metabolites by 21% and boosted their effect on arteries.

Uric acid kidney stones

Emerging evidenceHuman studyCrossover RCT · 47 patients; study of 20 volunteers

In lab tests, theobromine markedly slows uric acid crystals from forming and makes the crystals thinner.35 In a randomized trial of 47 adults with uric acid kidney stones, who took each treatment in turn, two weeks of citrate tablets lowered the share of people with high-risk urine from 63.8% to 44.7%, and citrate tablets with added theobromine, about 120 mg a day, lowered it to 38.3%; the gap between the two treatments wasn't statistically significant.24 With food, 20 healthy volunteers who ate 20 grams of dark chocolate or chocolate powder at breakfast and again at dinner had less uric acid crystallization in their overnight urine than before the study or after milk chocolate, and the more theobromine in their urine, the lower their risk.27

Study takeaway: dark chocolate lowered uric acid crystallization in urine, and theobromine slowed crystals in the lab.

Healthy aging and gum health

Emerging evidenceHuman study4 cohorts · 3,301 adults

In two European population studies, people with more theobromine in their blood had younger epigenetic age, a DNA-based measure of how fast the body is aging, on two separate markers, one of them an estimate of telomere length: first in 509 adults in the U.K., then again in 1,160 adults in Germany. The link held after the researchers accounted for other cocoa and coffee compounds, which suggests it's specific to theobromine.25 In two German cohorts of 679 and 953 adults followed for 7 and 10 years, higher theobromine in saliva was linked with healthier gums, with shallower pockets around the teeth and less loss of gum attachment.28

Study takeaway: higher theobromine levels were linked with slower epigenetic aging and healthier gums.

Arteries and blood pressure

Mixed evidenceHuman study3 RCTs · 24 to 44 adults

In the same placebo-controlled trial of 44 overweight adults with low HDL described in the HDL section below, 500 mg of theobromine a day for four weeks made arteries less stiff, lowering artery-stiffness scores by 1.7 points at rest and by 5.0 to 6.3 points after a high-fat meal, when it also widened the main artery in the arm; blood pressure and the standard test of how well arteries widen with blood flow didn't change.23 In 42 older adults with mildly high blood pressure, cocoa enriched to 979 mg of theobromine lowered central systolic pressure by 4.3 mmHg two hours after a dose, though after three weeks, 24-hour systolic pressure ran 3.2 mmHg higher than on placebo; cocoa with its natural 106 mg changed neither.29 A single 700 mg dose also lowered blood pressure at one hour in the caffeine comparison below.30 The blood pressure evidence for cocoa as a food is in the supplement section, and natural ways to lower blood pressure has the full plan.

Study takeaway: theobromine eased arterial stiffness, and its effect on blood pressure depended on the dose and timing.

Cough and airways

Mixed evidenceHuman study2 RCTs · healthy volunteers; 289 adults · 1 dark chocolate study

In a placebo-controlled study of healthy volunteers, theobromine calmed coughing triggered by capsaicin, the hot compound in chili peppers, with no side effects, and in lab tissue it quieted the vagus nerve signal behind the cough reflex.31 In a 289-person trial of adults with a persistent cough, 300 mg twice a day for two weeks improved cough-related quality of life by 2.4 points, against 2.2 on placebo, and cough severity fell 12.2 points against 11.0, differences that weren't statistically significant; the theobromine group had started with worse cough scores.16 At food amounts, 40 grams of dark chocolate strengthened the morning rise in airflow in 18 young women who were night owls, with no effect in early risers.32 For more natural support, see essential oils for cough.

Study takeaway: theobromine calmed an induced cough, and dark chocolate strengthened morning airflow in night owls.

Mood and alertness

Mixed evidenceHuman study4 controlled studies · 20 to 84 adults

In chocolate, theobromine works together with caffeine. In a placebo-controlled study, 20 adults given the caffeine and theobromine found in a 50-gram dark chocolate bar (19 mg and 250 mg) got the same boost in energetic arousal and mental performance as they did from the cocoa powder itself, and in a second study of 22, milk- and dark-chocolate amounts of the pair sharpened performance compared with white chocolate.7 On its own, theobromine is quieter: 100 to 400 mg in a cocoa drink made no significant difference to mood or vigilance in 24 young men,17 while in the dose study described below, 250 mg, about what an ounce of dark chocolate supplies, raised people's ratings of wanting more.11 For more foods that support focus, see brain foods.

Study takeaway: with chocolate's own caffeine, theobromine delivered the same lift as cocoa.

Does theobromine raise HDL cholesterol?

Quick answer

Yes, in two of three trials. In 152 healthy adults, 850 mg of added theobromine a day, taken alone or in cocoa, raised HDL cholesterol by about 6 mg/dL over four weeks and lowered apolipoprotein B and LDL.4 A 12-week trial in 80 adults with metabolic syndrome also raised HDL, by 1.72 mg/dL.21

A Dutch trial tested the question directly. Researchers gave 152 healthy men and women aged 40 to 70 a daily 200 mL drink for four weeks: cocoa with its natural 150 mg of theobromine, 850 mg of pure theobromine, cocoa with added theobromine (1,000 mg in all), or a placebo drink. Theobromine raised HDL by about 6 mg/dL (0.16 mmol/L), and it also raised apolipoprotein A-I, HDL's main protein, and lowered apolipoprotein B and LDL cholesterol. The cocoa's natural 150 mg didn't raise HDL significantly, and adding cocoa didn't change theobromine's effect, so the authors concluded theobromine may be the main ingredient behind cocoa's HDL effect.4

A 12-week trial in Iran pointed the same way. Eighty adults aged 40 to 55 with overweight or obesity and metabolic syndrome, all on a lower-calorie diet, took 450 mg of theobromine or a placebo daily, and 72 finished. Theobromine raised HDL by 1.72 mg/dL, improved three cholesterol ratios (LDL to HDL by 0.26, triglycerides to HDL by 0.41 and total cholesterol to HDL by 0.38) and trimmed waist size by 0.86 cm, about a third of an inch, beyond the diet alone; body weight, blood pressure, LDL, triglycerides and blood sugar didn't differ between the groups.21 A later analysis of the same trial found a rise in HDL2, the larger HDL particles, of 0.95 mg/dL against a 0.26 mg/dL drop on placebo.36

The third trial, in which 44 overweight adults with low HDL took 500 mg of theobromine and a placebo for four weeks each, found a different pattern. HDL rose only slightly (about 1 mg/dL, not a significant change), while LDL fell about 8 mg/dL and apolipoprotein B fell about 4 mg/dL. The same trial found higher blood sugar and insulin after a high-fat meal and a 1.2 mg/L rise in hs-CRP, a blood marker of inflammation, on theobromine.22

Trial	Who took part	Daily theobromine	How long	HDL	LDL and apoB
Netherlands, 20134	152 healthy adults, 40 to 70	850 mg in a drink	4 weeks	Up about 6 mg/dL	Both down
Iran, 202321	80 adults with metabolic syndrome, on a lower-calorie diet	450 mg capsules	12 weeks	Up 1.72 mg/dL	LDL unchanged; three cholesterol ratios improved
Netherlands, 201822	44 overweight adults with low HDL	500 mg capsules	4 weeks	About 1 mg/dL, not significant	LDL down about 8 mg/dL; apoB down

Across all three trials, theobromine moved cholesterol in a healthy direction, raising HDL in two and lowering LDL and apolipoprotein B in two. If cholesterol is your focus, start with the food and lifestyle steps in how to lower cholesterol naturally.

Three markers for your cholesterol picture

These three markers show where your heart health stands and give you a baseline to track as cacao and other food changes become part of your day. Go over your numbers with your practitioner.

HDL cholesterol: The protective cholesterol the theobromine trials raised.
ApoB: A count of the particles that carry LDL cholesterol through your blood.
hs-CRP: Low-grade inflammation anywhere in the body.

See the cellular bloodwork panel

Have results? Analyze them free →

Theobromine vs. caffeine: what's the difference?

Theobromine and caffeine are chemical cousins, and theobromine is the gentler, longer-lasting of the two. As I've explained on my show, caffeine works by blocking adenosine, a neurotransmitter that signals relaxation and sleepiness.37 Theobromine blocks those same receptors with two to three times weaker binding, and it stays in your body longer.11 34

The difference shows up in blood pressure and alertness. In a trial in which 24 healthy women took each treatment in turn, 700 mg of theobromine lowered blood pressure compared with placebo an hour after the dose and left people feeling a little less calm three hours later, while 120 mg of caffeine raised alertness and raised blood pressure. Taken together, the pair lifted mood the way caffeine did, with no rise in blood pressure.30 Cacao delivers the two together.

	Theobromine	Caffeine
Family	Methylxanthine	Methylxanthine
In an ounce of 70% to 85% dark chocolate	About 227 mg2	About 23 mg2
Hold on adenosine receptors	Two to three times weaker11	Stronger
Half-life	About 7 hours34	About 4 hours34
Blood pressure after a single dose	Lowered at 700 mg30	Raised at 120 mg30
Alertness	Quieter on its own; with caffeine, the lift of cocoa7	Raised alertness at 120 mg30

If caffeine keeps you up, enjoy chocolate earlier in the day; the dose section has the timing.

Should you take a theobromine supplement?

Quick answer

Not yet. Added theobromine raised HDL cholesterol in two placebo-controlled trials, but none ran longer than 12 weeks, so cacao and dark chocolate come first. They deliver theobromine together with the flavanols it helps absorb, and in a Cochrane review, flavanol-rich cocoa products lowered systolic blood pressure by about 4 mmHg in people with high blood pressure.38

On my show, I've made the point that when you take one part of a whole food and put it into a capsule at 10 times the dose, the absorption and the synergy of its parts working together are often diminished.39 Cacao shows that principle at work: its theobromine helps its flavanols get absorbed, and the flavanols do more for your arteries with theobromine beside them.5 26

Cocoa's methylxanthines raised peak flavanol levels 21%; caffeine alone, 10%

Source: Ottaviani et al. · Free Radical Biology and Medicine, 2023 [5]Theobromine, the main methylxanthine in cocoa, helped more of cacao's flavanols reach the blood; caffeine's smaller rise wasn't statistically significant.

The whole food has its own track record. The Cochrane review pooled 35 randomized trials with 1,804 mostly healthy adults and found that flavanol-rich chocolate and cocoa products lowered systolic blood pressure by 1.76 mmHg over two to 18 weeks, and by about 4 mmHg in the 401 people with high blood pressure; stomach complaints were uncommon, 1% against 0.4% on the comparison products.38 For more options, see foods that lower blood pressure.

Flavanol-rich cocoa lowered systolic pressure most in people with high blood pressure

Source: Ried et al. · Cochrane Database of Systematic Reviews, 2017 [38]Systolic blood pressure fell with flavanol-rich chocolate and cocoa products, and by more in people whose pressure started high.

That's one more reason I put the plate before the capsule. For now, a square or two of dark chocolate or a spoonful of raw cacao gives you theobromine the way it was designed to arrive, with its flavanols, magnesium and fiber alongside.

Want help fitting cacao into your day?

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How much theobromine per day?

Quick answer

There's no established daily dose of theobromine. For food, the amount I recommend is one to two squares of dark chocolate a day, 85% cacao or higher.8 Supplement trials used 450 to 850 mg a day for four to 12 weeks, and 250 to 1,000 mg as single doses.21 4 11

What the trial measured	Form studied	Daily amount	How long
HDL cholesterol	Theobromine drink	850 mg	4 weeks4
HDL and waist size, with a lower-calorie diet	Capsules	450 mg	12 weeks21
Cholesterol and arteries	Capsules	500 mg	4 weeks22
Persistent cough	Capsules	600 mg, in two doses	2 weeks16
Blood pressure	Cocoa drink enriched with theobromine	979 mg	3 weeks29
Uric acid stones	Citrate tablets with theobromine	About 120 mg	2 weeks24
Mood and heart rate	Capsules	250, 500 or 1,000 mg	Single doses11

In food terms, the 450 mg trial dose matches about 2 ounces (56 grams) of 70% to 85% dark chocolate, and the 850 mg dose about 106 grams, or 3.7 ounces.2 By one estimate, people in the top 10% for theobromine intake in the U.S. get only about 150 mg a day from their diet.11

In a study that compared doses directly, 84 healthy adults aged 18 to 35 each took single capsules of 250, 500 and 1,000 mg of theobromine, 200 mg of caffeine and a placebo on separate days. Heart rate rose step by step with the dose, with a peak rise of 0.51 beats per minute on placebo, 1.42 on 250 mg, 2.49 on 500 mg and 3.27 on 1,000 mg, and theobromine didn't significantly raise systolic blood pressure. At 250 mg, people rated the effects as something they'd want more of; at 500 and 1,000 mg, their ratings of disliking the effects rose, and the 1,000 mg dose accounted for 9 of the 13 headaches and 6 of the 8 reports of nausea.11

For everyday life, think in food amounts: one or two squares of dark chocolate, or a spoonful of raw cacao or cocoa powder in a drink or smoothie. Because theobromine lingers, a square eaten in the afternoon is still partly in your system at bedtime. On my show, I've said a square of dark chocolate in the evening probably won't bother you much, but half a bar carries enough caffeine to affect adenosine, tell your body it isn't tired and interfere with melatonin production.33 If your sleep is fragile, enjoy chocolate earlier in the day; sleep hygiene covers the rest of the evening routine.

Easy ways to enjoy cacao

The simplest way to get theobromine is to make cacao a small, regular part of your food.

Make a warm cacao drink. Whisk a tablespoon of raw cacao powder or unsweetened cocoa powder into warm milk or water, and sweeten it lightly with raw honey if you like.

Blend it into a smoothie with a spoonful of raw cacao or cocoa powder, a banana and nut butter; see healthy smoothie recipes.

Sprinkle cacao nibs over yogurt, oatmeal or fresh fruit for crunch.

Savor a square of 85% dark chocolate after lunch, when its lift fits your day.

Add depth to savory food by stirring a spoonful of cocoa powder into chili or a spice rub.

Bake with raw cacao or cocoa powder, sweetening lightly with honey or Medjool dates.

When you shop, three checks get you the most from cacao:

Go dark. Choose chocolate of 85% cacao or higher. Darker chocolate brings more theobromine and less sugar: by USDA data, an ounce of 70% to 85% dark chocolate has about 7 grams of sugar, against about 15 in an ounce of milk chocolate.2 15
Pick natural cocoa. In a survey of commercial cocoa powders, natural cocoa averaged 34.6 milligrams of flavanols per gram, against 3.9 in heavily alkalized, or Dutch-processed, cocoa.46 Under FDA rules, alkalized cocoa is labeled "processed with alkali."47
Sweeten it yourself, sparingly. Cane sugar, even the less-refined kind, is still sugar with very few nutrients. For a cacao drink or a batch of baking, raw honey is the far better choice, and a little goes a long way.

Theobromine side effects & who should be careful

Quick answer

At food amounts, theobromine is well tolerated. In supplement trials, headache, nausea and a slightly faster heart rate rose with the dose, especially at 600 to 1,000 mg.16 11 Skip theobromine supplements in pregnancy and while nursing, avoid chocolate and cocoa for 12 hours before a drug-based cardiac stress test, and keep chocolate away from dogs.14 12

A 2015 review concluded that, unlike in other mammals, pets included, theobromine is safe for people and has fewer unwanted effects than caffeine.1 In the 289-person cough trial, 600 mg a day for two weeks brought headaches to 12.8% of people, against 6.8% on placebo, with an overall side-effect profile similar to placebo.16 In the 12-week trial of 450 mg a day, five people on theobromine reported side effects, mostly nausea and headache, and one stopped because of them.36

Good to know before you use theobromine

Pregnancy and nursing: skip theobromine supplements, which haven't been studied in pregnancy. Chocolate at food amounts has been: in a randomized trial, 131 pregnant women at risk of preeclampsia ate 30 grams of chocolate a day for 12 weeks, and blood flow in the uterine arteries improved in both the high- and low-theobromine groups.40
Cardiac stress tests: the label for regadenoson, a drug used in cardiac stress tests, says methylxanthines interfere with it and tells patients to avoid products containing them, including coffee and tea, for at least 12 hours beforehand. Theobromine is a methylxanthine, so count chocolate, cocoa and theobromine supplements too.14 13
Theophylline or aminophylline: these prescription drugs are methylxanthines as well. If you take either one, review a theobromine supplement with your prescriber or pharmacist before starting it, and don't change the prescription on your own.14
Heart rhythm or blood pressure concerns: stay with food amounts rather than supplements.11 29
Stop signs: stop a supplement and get medical care right away for chest pain, fainting or a racing heartbeat that doesn't settle.

Heavy metals in chocolate

Cocoa products can carry lead and cadmium. In tests of 72 dark chocolate and cocoa products bought in the U.S. between 2014 and 2022, 43% exceeded California's strict daily limit for lead, and 13 of the 37 with daily cadmium figures (35%) exceeded its limit for cadmium, while 70 of the 72 fell below the FDA's reference level for lead. The researchers noted that for more than half of the products, a single serving may not pose any appreciable risk for the average person, while some products, or several servings a day on top of other sources, could add up.41 That's one more reason to enjoy chocolate by the square.

Is theobromine toxic to dogs?

Yes. Dogs clear theobromine far more slowly than people, with a half-life of about 17.5 hours against about 7 in humans, so the chocolate you enjoy can poison your dog.12 34 Mild signs can appear at about 20 mg of methylxanthines per kilogram of body weight, heart effects at 40 to 50 mg/kg and seizures at 60 mg/kg or more.12 For a 20-pound (9-kilogram) dog, 20 mg/kg is about 180 mg, less than the roughly 250 mg of theobromine and caffeine in an ounce of 70% to 85% dark chocolate.2

In the records of 156 dogs seen at a Berlin veterinary clinic after eating chocolate, 44 showed signs such as agitation, tremor and a racing heart, and 28 of those had eaten dark or bitter chocolate; with prompt care, 43 of the 44 survived.42 These animal findings can't be applied to people, who handle theobromine very differently.43 If your dog eats chocolate, call your veterinarian or an animal poison control line right away.

The bottom line

Is theobromine good for you?

Yes, in the form cacao delivers it. Theobromine is the gentle, long-lasting stimulant in cacao, and in the food it helps the flavanols that support your blood vessels reach your bloodstream. Cacao has been valued as food and medicine for centuries, for everything from mental fatigue to gout, and I take that long record seriously. On its own, theobromine raised HDL cholesterol in two placebo-controlled trials, and its benefits for arteries, uric acid stones and healthy aging are promising.

Enjoy one or two squares of 85% or darker chocolate a day, or a spoonful of raw cacao or cocoa powder, earlier in the day if you're sensitive to caffeine. Skip theobromine supplements in pregnancy, avoid cocoa before a drug-based cardiac stress test, and keep every bar out of your dog's reach. Your body was designed to heal, and a whole food like cacao gives it more to work with than any single compound pulled out of it.

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Theobromine: frequently asked questions

What is theobromine?

Theobromine is a natural compound in the methylxanthine family, the same family as caffeine, and cacao is its richest source.13 It works mainly by blocking adenosine receptors and inhibiting phosphodiesterase enzymes.1

Is theobromine good for you?

Yes, especially as part of cacao, where it helps flavanols reach your blood.5 On its own, it raised HDL cholesterol in two placebo-controlled trials.4 21

Is theobromine a stimulant?

Yes, a mild one. It blocks the same adenosine receptors caffeine does with two to three times weaker binding, and in chocolate it teams with a little caffeine to give cocoa its lift.11 7

Theobromine vs. caffeine: which lasts longer?

Theobromine does. Its half-life is about 7 hours, against about 4 for caffeine, and it's gentler on blood pressure: 700 mg lowered it an hour after a dose, while 120 mg of caffeine raised it.34 30

Does theobromine keep you awake?

Theobromine lingers, with a half-life of about 7 hours,34 and chocolate carries some caffeine too. As Dr. Axe has said on his show, a square of dark chocolate in the evening probably won't bother you much, but half a bar carries enough caffeine to affect your sleep signals.33 If you're sensitive, enjoy larger amounts earlier in the day.

How much theobromine is in dark chocolate?

About 227 milligrams per ounce of 70% to 85% dark chocolate, 179 in 60% to 69% and 140 in 45% to 59%, by USDA data.2 18 19 A tablespoon of unsweetened cocoa powder carries about 111 milligrams.3

Does white chocolate have theobromine?

Almost none: about 0.04 milligrams of theobromine and caffeine combined per gram.12 For theobromine, choose dark chocolate or cocoa powder.

Does cocoa butter have theobromine?

Very little. In measurements summarized in a 2013 review, cocoa butter carried about 0.14 milligrams of theobromine per gram, against 5 to 7.5 milligrams per gram in dark chocolate.13

Does theobromine raise HDL cholesterol?

Yes, in two of three trials: 850 mg of added theobromine a day raised HDL by about 6 mg/dL over four weeks in a trial of 152 adults, and 450 mg a day raised it 1.72 mg/dL in 80 adults over 12 weeks.4 21

Does theobromine lower blood pressure?

It can in the short term: a single 700 mg dose lowered blood pressure an hour later, and cocoa enriched with theobromine lowered central systolic pressure by 4.3 mmHg two hours after a dose.30 29 Over three weeks, that high-dose cocoa raised 24-hour systolic pressure by 3.2 mmHg,29 while flavanol-rich cocoa at food amounts lowered blood pressure across 35 trials.38

Does theobromine help a cough?

It calmed an induced cough in healthy volunteers.31 In 289 adults with a persistent cough, 600 mg a day for two weeks was well tolerated, and cough-related quality of life improved 2.4 points on theobromine and 2.2 on placebo.16 In South Korea, it has been approved for persistent cough since 2009.16

Can theobromine help you lose weight?

It trimmed waist size in one trial: with a lower-calorie diet, 450 mg a day for 12 weeks took an extra 0.86 cm, about a third of an inch, off the waist, though body weight didn't differ from placebo.21 Cacao fits best as part of a whole-food plan like the one in how to lose belly fat.

What are the side effects of theobromine?

At food amounts, few. In supplement trials, headache, nausea and a slightly faster heart rate rose with the dose: 600 mg a day brought headaches to 12.8% of people against 6.8% on placebo, and 1,000 mg accounted for 9 of the 13 headaches in a dose study.16 11

Should I take a theobromine supplement?

Not yet; cacao and dark chocolate come first. They bring theobromine along with the flavanols it helps your body absorb, and Dr. Axe recommends one to two squares of 85% or darker chocolate a day.5 8

How much theobromine per day is safe?

There's no established daily dose. At food amounts, Dr. Axe recommends one to two squares of 85% or darker chocolate a day.8 Supplement trials used 450 to 850 mg a day for up to 12 weeks, and in a single-dose study of 84 adults, headaches and nausea clustered at 1,000 mg.21 4 11

Is theobromine safe during pregnancy?

Skip theobromine supplements, which haven't been studied in pregnancy. Chocolate at food amounts has been: in a randomized trial, 131 pregnant women at risk of preeclampsia ate 30 grams a day for 12 weeks, and uterine artery blood flow improved in both chocolate groups.40

Is theobromine addictive?

No. A 2015 review notes that neither theobromine nor caffeine is an addictive substance.1 Researchers who tested the caffeine and theobromine in a dark chocolate bar concluded that chocolate's other qualities probably matter much more than these compounds in explaining chocolate cravings.7

What foods have theobromine besides chocolate?

Cacao is by far the richest source. Brewed black tea carries only a trace, about 2 milligrams per 100 grams, guaraná extracts contain some, and your body makes a little from the caffeine you drink.45 1 10

Does theobromine contain bromine?

No. Despite the name, theobromine is 3,7-dimethylxanthine, a close chemical relative of caffeine, and it contains no bromine.11

Why is chocolate toxic to dogs?

Dogs clear theobromine slowly, with a half-life of about 17.5 hours, and mild signs can start at about 20 mg of methylxanthines per kilogram of body weight.12 If your dog eats chocolate, call your veterinarian right away.

Freshness & update log

October 9, 2026 — Trimmed repeated book references.

October 1, 2026 (second update) — Added a table comparing the three HDL trials; added a three-point shopping checklist (darker chocolate for more theobromine and less sugar, with USDA sugar values; natural rather than alkalized cocoa, with a flavanol survey and the FDA labeling rule; raw honey, used sparingly, in place of cane sugar); added an FAQ answer on how much theobromine a day is safe; gave the 21% flavanol result and the product studied in the at-a-glance summary, and added a link there to the free protocol; converted the HDL, LDL and apoB results to mg/dL; replaced trial-design jargon with plain wording; shortened the funding note in the research summary; added two references.

October 1, 2026 — Rewrote the page in full. Added the Dr. Axe Score under the current supplement weighting (editorial score 5.6) with an Interaction check; added the human trials of theobromine on HDL cholesterol, arteries and blood pressure, cough, mood and uric acid kidney stones, the studies showing that theobromine helps cacao's flavanols reach the blood, and USDA theobromine values for cocoa powder and dark and milk chocolate; replaced the blood pressure, asthma, focus and weight-loss claims with the trial results; replaced the "300 to 600 milligrams per day" safety range with the doses tested and their side effects; corrected the statements that coffee comes from cocoa beans and that cocoa butter is the lower-fat part of the bean; removed the diuretic, edema and sleep-aid claims and the carob swap; and added cardiac stress test, pregnancy, heavy metal and expanded pet guidance.

Originally published January 12, 2024. —

References

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.

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

On this page

What is it?
Where it's found
What is it good for?
How it works
Benefits, ranked
HDL cholesterol
vs. caffeine
Supplement or cacao?
How much a day
Ways to enjoy it
Side effects
The bottom line
Is theobromine good for you?
FAQ

Quick facts

What it isThe main natural stimulant in cacao, a close chemical cousin of caffeine
Richest foodsCocoa powder, about 111 mg per tablespoon; 70% to 85% dark chocolate, about 227 mg per ounce
Best-studied benefitHigher HDL cholesterol in placebo-controlled trials of 450 and 850 mg a day
As a supplementNot yet; cacao and dark chocolate come first
Be careful withHigh doses, pregnancy, drug-based cardiac stress tests, and chocolate around dogs
Interaction checkModerate for supplements; Low for chocolate at food amounts

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