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Find the answer. Then know what to do.

Search any symptom, condition, supplement, food, therapy or biomarker. Every entry is doctor-reviewed, cites its evidence, and ends with what to do next.

TrendingMagnesium glycinateApoBBerberineHypothyroidismLeaky gutFerritin
What you'll see when you type “magnesium”
MagnesiumSupplementMagnesium deficiencyConditionRBC MagnesiumBiomarkerMagnesium glycinate vs citrateComparisonAsk Dr. Axe AI about magnesium→
The library

Seven databases. One structure.

Conditions, supplements, foods, biomarkers, therapies, peptides and essential oils — each with its own doctor-reviewed template, so you always know where the evidence is and what to do next. Protocols and recipes put it all into practice.

445 entries

Conditions & Symptoms

What it is, signs, potential contributors, testing and the natural first steps.

507 entries

Supplements & Herbs

Evidence, best form, dose, timing, safety and interactions.

960 entries

Foods & Nutrition

Benefits, nutrition, best uses, who may benefit, recipes.

New54 entries

Biomarkers & Lab Tests

What it measures, reference and target ranges, high vs low, related markers.

345 entries

Therapies

What it is, the evidence, who it may help, risks, and how to access it.

7 entries

Peptides

Mechanism, the evidence, dosing considerations, safety and legal status.

80 entries

Essential Oils

Uses, evidence, how to apply, safety and what to pair with.

Put it into practice

Protocols & Recipes

Free step-by-step protocols and recipes built from the library.

Prefer to browse?Start with a health concern →Free tools →Browse Health A–Z →See all 445 health topics →
Conditions & symptoms

Start with what you feel. End with what to do.

The most-searched conditions and symptoms, each with the signs, the potential contributors, the labs worth asking for, and a protocol to consider.

Leaky gutSigns, testing, the 30-day protocolProtocol includedHypothyroidism & Hashimoto'sFull thyroid panel, nutrients, gutProtocol includedAdrenal fatigue & burnoutCortisol rhythm, sleep, blood sugarProtocol includedInsulin resistanceFasting insulin, food order, movementProtocol includedBloating & SIBODigestion, microbiome, trigger foodsProtocol includedCandida overgrowthSigns, diet, antifungal herbsProtocol includedPCOSInsulin, androgens, cycle supportProtocol includedAutoimmune conditionsGut, triggers, calming inflammationProtocol includedAnxietyBlood sugar, magnesium, nervous systemProtocol includedBrain fogSleep, thyroid, inflammation, ironProtocol includedChronic fatigueMitochondria, nutrients, cortisolProtocol includedAcid refluxStomach acid, timing, triggersProtocol included
See all 445 conditions & symptoms Not sure? Take the 2-minute quiz
Supplements & herbs

What works, in which form, at what dose.

Evidence-rated entries for the supplements and herbs people ask about most — best form, timing, safety and interactions, with no hype.

MagnesiumGlycinate vs citrate, sleep, musclesAshwagandhaCortisol, stress, dosingBerberineBlood sugar, gut, timingVitamin D3 + K2Immunity, bones, target levelsOmega-3Inflammation, heart, brainProbioticsStrains, CFUs, when they helpTurmeric & curcuminAbsorption, dosing, safetyLion's maneFocus, nerve support, evidenceCollagenSkin, joints, gut liningZincImmunity, skin, copper balanceCreatineMuscle, brain, who benefitsNACGlutathione, liver, lungs
See all 507 supplements & herbs Herbs & adaptogensAsk the Vitamin Advisor which are worth it for you
Biomarkers & lab tests

The numbers on your labs, explained.

Every biomarker page answers the same questions — in plain language, with the standard range, the target range and what influences it — and connects to CellRx and Dr. Axe AI.

ApoBThe particle count behind cardiovascular risk that a standard cholesterol panel can miss.Standard vs target range hs-CRPLow-grade, whole-body inflammation.Standard vs target range GGTA sensitive read on liver load, oxidative stress and glutathione demand.Standard vs target range Free T3The active thyroid hormone — and why TSH alone can miss a pattern.Standard vs target range FerritinStored iron; low levels travel with fatigue, hair changes and poor recovery.Standard vs target range HomocysteineMethylation and B-vitamin status; elevated levels matter for vessels and brain.Standard vs target range RBC MagnesiumMagnesium inside the cell, where depletion shows up first.Standard vs target range Fasting insulinOften the earliest sign of lost metabolic flexibility, years before glucose moves.Standard vs target range Lp(a)A largely genetic risk particle most checkups never order.Standard vs target range
See all biomarkers & lab tests Test your own with CellRx

What every biomarker page answers

Target ranges cite their source, population and clinical caveats, and show a last-reviewed date. How target ranges are set

  • What is it?
  • What does high mean?
  • What does low mean?
  • Standard vs target ranges
  • What influences it?
  • How might it be improved?
  • Related labs
  • Ask Dr. Axe AI about it
Foods & nutrition

Food as medicine, food by food.

Browse 960 whole foods by category. Every entry covers what it helps, how to use it, and who may want to be careful.

VegetablesFruitsProteinsWhole grainsMushroomsFats & oilsHerbs & spicesNuts & seeds
BroccoliSulforaphane, detox supportSpinachFolate, magnesium, ironGarlicImmune & heart supportBeetsNitric oxide, circulationBlueberriesAntioxidants, brainAvocadoHealthy fats, potassiumBone brothGut lining, collagenWild salmonOmega-3s, proteinSweet potatoBeta-carotene, potassiumPomegranatePunicalagins, heartGreen teaEGCG, focusKefirProbiotics, microbiome
Explore all 960 foods Browse 342 recipes
Therapies · Peptides · Essential oils

Three more databases, held to the same evidence bar.

Some of the most-searched topics in natural health have the least reliable information online. Each entry states the evidence plainly, who it may help, and the risks.

Compare

Side by side, in plain language.

The questions people actually type — answered with the evidence for each option, who each suits, and what Dr. Axe would consider first.

vsMagnesium glycinate vs citrateAbsorption, sleep, digestionvsNAC vs glutathioneAntioxidant support, form, evidencevsBerberine vs metforminBlood sugar — what the studies showvsCollagen vs bone brothSkin, joints, gutvsFree T3 vs total T3Which thyroid marker tells you whatvsApoB vs LDLReading cardiovascular riskvsCreatine monohydrate vs other forms
See all comparisons Pick any two to compare
How entries are built

Seven templates. Same discipline.

You never have to hunt for the dose or the evidence. Each content type follows one structure, reviewed by the medical advisory board.

Supplements

  1. Evidence
  2. Benefits
  3. Best form
  4. Dosage
  5. Timing
  6. Safety & interactions
  7. Who may benefit
  8. Evidence rating

Conditions

  1. What it is
  2. Signs
  3. Potential contributors
  4. Testing
  5. Nutrition
  6. Supplements
  7. Lifestyle
  8. When to see a clinician

Foods

  1. Benefits
  2. Nutrition
  3. Best uses
  4. Who may benefit
  5. Recipes
  6. Potential cautions

Biomarkers

  1. What it measures
  2. Reference range
  3. Target interpretation
  4. High / low
  5. Related markers
  6. Actions to consider

Therapies

  1. What it is
  2. Evidence
  3. Who it may help
  4. Risks & contraindications
  5. What to expect
  6. How to access it

Peptides

  1. Mechanism
  2. Evidence
  3. Dosing considerations
  4. Safety
  5. Legal & regulatory status
  6. Related compounds

Essential Oils

  1. Uses
  2. Evidence
  3. How to apply
  4. Safety & dilution
  5. What to pair with
  6. Who should avoid it
Follow a topic · Free

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Your brief: Thyroid

Reviewed by specialists in endocrinology, functional medicine, cardiology, nutrition and longevity.Our protocols and source library are reviewed against current clinical evidence by our medical advisory board. Dr. Axe AI grounds its answers in that reviewed library and shows the sources behind every response.
Meet the Medical Advisory Board
3,024 topics · sorted A to Z
#345 entries
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A142 entries
B210 entries
C237 entries
D128 entries
E70 entries
F57 entries
G90 entries
H331 entries
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K45 entries
L58 entries
M102 entries
N64 entries
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