Supplement Database

Evidence-graded supplement profiles with dosage guidance, form comparisons, interaction warnings, and clinical citations. No affiliate links. No product sales. Just science.

Filter by Goal
Filter by Evidence Grade

Magnesium Glycinate

Grade A200400 mg

Highly bioavailable form of magnesium. Strong evidence for sleep quality, muscle relaxation, and stress reduction. Most adults are deficient.

🌙 Sleep💪 Muscle & Recovery🧘 Stress & Anxiety😊 Mood
2 studies

Magnesium L-Threonate

Grade B10002000 mg

The only magnesium form shown to cross the blood-brain barrier effectively. Promising for cognitive function and brain aging.

🧠 Cognitive Performance🎯 Focus🌙 Sleep
1 study

Vitamin D3

Grade A20005000 IU

Essential hormone precursor. Most people in northern latitudes are deficient. Strong evidence for immunity, bone health, and mood.

🛡️ Immunity😊 Mood🧬 Longevity💪 Muscle & Recovery
3 studies

Omega-3 Fish Oil

Grade A10003000 mg EPA+DHA

Essential fatty acids with strong evidence for cardiovascular and mental health. EPA-dominant for mood; triglyceride form for absorption.

❤️ Heart Health😊 Mood🧠 Cognitive Performance🧬 Longevity
3 studiesHigh-risk interactions

Creatine Monohydrate

Grade A35 g

One of the most researched supplements in history. Strong evidence for strength, power, and emerging evidence for brain function.

💪 Muscle & Recovery🧠 Cognitive Performance Energy
3 studies

Ashwagandha

Grade A300600 mg

Ayurvedic adaptogen with strong clinical evidence for cortisol reduction (15-30%), stress relief, and exercise performance.

🧘 Stress & Anxiety🌙 Sleep💪 Muscle & Recovery Energy+1
3 studiesHigh-risk interactions

L-Theanine

Grade B100400 mg

Amino acid from green tea. Promotes calm focus (alpha brain waves) without drowsiness. Excellent safety profile.

🎯 Focus🧘 Stress & Anxiety🌙 Sleep🧠 Cognitive Performance
3 studies

Rhodiola Rosea

Grade B200600 mg

Adaptogenic herb with strong evidence for reducing stress-related fatigue. Comparable to low-dose antidepressants for mild depression.

Energy🧘 Stress & Anxiety🎯 Focus😊 Mood
3 studiesHigh-risk interactions

Lion's Mane

Grade B5003000 mg

Medicinal mushroom that stimulates NGF. Multiple RCTs show benefits for mild cognitive impairment and mood.

🧠 Cognitive Performance🎯 Focus😊 Mood
3 studies

NAC (N-Acetyl Cysteine)

Grade B6001800 mg

Precursor to glutathione (master antioxidant). Strong evidence for respiratory health, liver support, and psychiatric conditions.

🛡️ Immunity🧬 Longevity😊 Mood🦠 Gut Health
3 studiesHigh-risk interactions

CoQ10 (Ubiquinol)

Grade A100300 mg

Critical for mitochondrial energy production. Q-SYMBIO trial showed 43% cardiovascular mortality reduction in heart failure. Depleted by statins.

❤️ Heart Health Energy🧬 Longevity
3 studies

Zinc

Grade A1530 mg

Essential mineral for immune function, wound healing, and testosterone production. Lozenges reduce cold duration by ~33%.

🛡️ Immunity Skin & Hair💪 Muscle & Recovery
3 studies

Vitamin K2 (MK-7)

Grade B100200 mcg

Directs calcium to bones and teeth, away from arteries. Essential when supplementing Vitamin D3.

❤️ Heart Health🧬 Longevity
2 studiesHigh-risk interactions

B-Complex

Grade B11 capsule

Group of essential vitamins for energy metabolism, nervous system function, and mood. Methylated forms preferred for MTHFR variants.

Energy😊 Mood🧠 Cognitive Performance
3 studies

Melatonin

Grade A0.33 mg

Natural sleep hormone. Lower doses (0.3-1mg) are often more effective than high doses. Best for sleep onset and circadian reset.

🌙 Sleep
3 studiesHigh-risk interactions

Berberine

Grade A5001500 mg

Potent plant alkaloid with metformin-like effects on blood sugar. Also activates AMPK (longevity pathway). Multiple drug interactions.

🧬 Longevity🦠 Gut Health❤️ Heart Health
3 studiesHigh-risk interactions

Curcumin

Grade B5001000 mg

Potent anti-inflammatory from turmeric. Must enhance bioavailability with piperine or specialized formulations.

🧬 Longevity😊 Mood🦠 Gut Health
1 study

Probiotics

Grade B1050 billion CFU

Beneficial bacteria for gut health. Strain selection matters — L. rhamnosus GG, B. infantis 35624, and S. boulardii are best-studied.

🦠 Gut Health🛡️ Immunity😊 Mood
3 studies

Vitamin C

Grade A5002000 mg

Essential antioxidant vitamin. Supports immune function, collagen synthesis, and antioxidant defense. 50% infection reduction in athletes.

🛡️ Immunity Skin & Hair🧬 Longevity
2 studies

Alpha-GPC

Grade B300600 mg

Most bioavailable choline source for the brain. Supports acetylcholine production for memory, focus, and muscle contraction.

🧠 Cognitive Performance🎯 Focus💪 Muscle & Recovery
3 studies

Bacopa Monnieri

Grade B300600 mg

Ayurvedic herb with strong meta-analytic evidence for memory and learning. Requires consistent use for 8-12 weeks.

🧠 Cognitive Performance🎯 Focus🧘 Stress & Anxiety
3 studies

Tongkat Ali

Grade C200400 mg

Southeast Asian herb with emerging evidence for cortisol reduction and hormonal support.

Energy💪 Muscle & Recovery😊 Mood🧘 Stress & Anxiety
1 study

Boron

Grade C36 mg

Trace mineral that supports calcium metabolism, vitamin D utilization, and potentially testosterone levels.

💪 Muscle & Recovery🧬 Longevity
1 study

Selenium

Grade B100200 mcg

Essential trace mineral for thyroid function (T4→T3 conversion) and antioxidant defense. Reduces Hashimoto's antibodies.

🛡️ Immunity🧬 Longevity Skin & Hair
3 studies

Glycine

Grade B35 g

Inhibitory amino acid that improves sleep quality by lowering core body temperature. Also supports collagen synthesis.

🌙 Sleep🧬 Longevity🦠 Gut Health
3 studies

Taurine

Grade B10003000 mg

Conditionally essential amino acid. Landmark 2023 Science paper showed it extends healthy lifespan in multiple species.

🧬 Longevity❤️ Heart Health Energy
1 study

Citrulline

Grade B38 g

Converts to arginine and boosts nitric oxide production. Improves exercise performance and blood flow.

💪 Muscle & Recovery Energy❤️ Heart Health
1 study

Beta-Alanine

Grade A36 g

Increases muscle carnosine levels, buffering acid during high-intensity exercise. Well-supported for 1-4 min high-intensity efforts.

💪 Muscle & Recovery Energy
3 studies

Phosphatidylserine

Grade B100300 mg

Phospholipid that supports cell membrane integrity in the brain. FDA-qualified health claim for cognitive decline. Reduces cortisol.

🧠 Cognitive Performance🧘 Stress & Anxiety🎯 Focus💪 Muscle & Recovery
2 studies

PQQ (Pyrroloquinoline Quinone)

Grade C1020 mg

Stimulates mitochondrial biogenesis (creation of new mitochondria). Best paired with CoQ10. Still early research.

🧠 Cognitive Performance Energy🧬 Longevity
2 studies

NMN (Nicotinamide Mononucleotide)

Grade B250500 mg

NAD+ precursor with multiple human RCTs showing elevated blood NAD+ and improved physical performance. Exciting longevity candidate.

🧬 Longevity Energy
3 studies

Apigenin

Grade B50100 mg

Flavonoid from chamomile. Binds GABA-A receptor for mild sedation and anxiety relief. Also inhibits CD38 (NAD+ preservation).

🌙 Sleep🧘 Stress & Anxiety
2 studies

GABA

Grade B100300 mg

The main inhibitory neurotransmitter. PharmaGABA form shows RCT evidence for relaxation and sleep. May work via gut-brain axis.

🌙 Sleep🧘 Stress & Anxiety
2 studiesHigh-risk interactions

5-HTP

Grade B50300 mg

Direct serotonin precursor. Effective for mood and sleep but DANGEROUS with serotonergic medications.

😊 Mood🌙 Sleep
3 studiesHigh-risk interactions

SAMe

Grade B4001600 mg

Key methyl donor involved in neurotransmitter synthesis. Cochrane-level evidence for depression, comparable to TCAs.

😊 Mood🧬 Longevity
3 studiesHigh-risk interactions

Iron

Grade A1845 mg

Essential for oxygen transport and energy. ONLY supplement if deficient — excess iron is a pro-oxidant. Bisglycinate form preferred.

Energy
3 studies

Calcium

Grade A5001000 mg

Essential for bone health, but food sources preferred. If supplementing, always pair with Vitamin D3 and K2.

💪 Muscle & Recovery
1 study

Potassium

Grade A200500 mg

Critical electrolyte for heart and muscle function. Most people need more, but get it from food — supplemental doses are limited.

❤️ Heart Health💪 Muscle & Recovery Energy
1 studyHigh-risk interactions

Lutein

Grade B1020 mg

Carotenoid concentrated in the retina and brain. Strong evidence for eye health; emerging evidence for cognitive function.

🧠 Cognitive Performance🧬 Longevity Skin & Hair
1 study

Astaxanthin

Grade C412 mg

Extremely potent antioxidant carotenoid. Promising for skin health and exercise recovery. Still building human evidence.

Skin & Hair🧬 Longevity Energy
1 study

Sulforaphane

Grade B1040 mg

Powerful Nrf2 activator from cruciferous vegetables. Evidence for air pollution detoxification and H. pylori eradication.

🧬 Longevity🛡️ Immunity🦠 Gut Health
3 studies

Tart Cherry

Grade B3060 mL concentrate

Natural source of melatonin and anti-inflammatory compounds. Evidence for sleep quality improvement and one of the best supplements for DOMS reduction.

🌙 Sleep💪 Muscle & Recovery
3 studies

Valerian Root

Grade B300600 mg extract

Traditional sleep herb with moderate RCT support. Comparable to low-dose benzodiazepines. Not acutely sedating — builds over weeks.

🌙 Sleep🧘 Stress & Anxiety
3 studies

Passionflower

Grade B250500 mg extract

Gentle anxiolytic herb comparable to low-dose oxazepam. Effective for pre-surgical anxiety and sleep without next-day impairment.

🌙 Sleep🧘 Stress & Anxiety
3 studies

CDP-Choline (Citicoline)

Grade B250500 mg

Bioavailable choline source that also elevates dopamine and acetylcholine. Cognizin form best studied for attention and working memory.

🧠 Cognitive Performance🎯 Focus
2 studies

Ginkgo Biloba

Grade B120240 mg

Increases cerebral blood flow and has vasodilatory effects. Modest benefit for existing dementia symptoms but does not prevent it.

🧠 Cognitive Performance❤️ Heart Health🧘 Stress & Anxiety
3 studiesHigh-risk interactions

Phosphatidylcholine

Grade B12002400 mg

Dietary choline source for acetylcholine synthesis and liver health. Sunflower lecithin is soy-free alternative.

🧠 Cognitive Performance🦠 Gut Health
2 studies

Huperzine A

Grade B50200 mcg

Potent acetylcholinesterase inhibitor. Effective for memory but narrow therapeutic window — cycling and careful dosing required.

🧠 Cognitive Performance🎯 Focus
3 studiesHigh-risk interactions

Cordyceps

Grade B10004000 mg

Medicinal mushroom with RCT evidence for improved VO2 max and exercise tolerance. 3-4g/day for athletic performance.

Energy💪 Muscle & Recovery🛡️ Immunity
2 studies

St. John's Wort

Grade A300900 mg

Cochrane-validated antidepressant comparable to SSRIs for mild-moderate depression. CRITICAL: interacts with many drugs via CYP induction.

😊 Mood
3 studiesHigh-risk interactions

Saffron

Grade A3030 mg

Potent natural antidepressant with multiple RCTs showing comparable efficacy to fluoxetine at just 30mg/day. Also supports eye health.

😊 Mood🧠 Cognitive Performance
3 studies

NR (Nicotinamide Riboside)

Grade B3001000 mg

NAD+ precursor with strong human RCT evidence for NAD+ elevation. Unique cardiovascular benefits: reduced arterial stiffness and blood pressure.

🧬 Longevity Energy❤️ Heart Health
3 studies

Resveratrol

Grade B100500 mg

SIRT1 activator commonly combined with NMN/NR. Human evidence for metabolic improvement and cognitive support. Lipid-soluble — take with fat.

🧬 Longevity❤️ Heart Health🧠 Cognitive Performance
3 studies

Quercetin

Grade B5001000 mg

Versatile flavonoid with senolytic, immune, and anti-inflammatory properties. Zinc ionophore. Phytosome form critical for absorption.

🧬 Longevity🛡️ Immunity
3 studiesHigh-risk interactions

Fisetin

Grade C100500 mg

Most potent natural senolytic compound tested. Intermittent "hit-and-run" dosing protocol (2 days/month) for clearing senescent cells.

🧬 Longevity🧠 Cognitive Performance
3 studies

Spermidine

Grade B12 mg

Autophagy inducer with strong epidemiological link to reduced all-cause mortality. RCT evidence for memory improvement in elderly.

🧬 Longevity🧠 Cognitive Performance❤️ Heart Health
3 studies

HMB (Beta-Hydroxy Beta-Methylbutyrate)

Grade B33 g

Leucine metabolite that preserves lean mass and reduces muscle damage. Best for elderly, untrained, or during caloric restriction.

💪 Muscle & Recovery
3 studies

Collagen Peptides

Grade B1015 g

Evidence for connective tissue repair (with vitamin C + exercise), skin elasticity, and joint pain. Timing matters for tendons.

💪 Muscle & Recovery Skin & Hair
3 studies

Psyllium Husk

Grade A515 g

Soluble fiber with FDA-approved health claim for cholesterol reduction. Also effective for blood sugar control and constipation.

🦠 Gut Health❤️ Heart Health
2 studiesHigh-risk interactions

Glutamine

Grade B510 g

Conditionally essential amino acid that is the primary fuel for gut lining cells. RCT evidence for IBS and leaky gut.

🦠 Gut Health🛡️ Immunity💪 Muscle & Recovery
2 studies

Digestive Enzymes

Grade B12 capsules

Enzyme supplementation for digestive support. Standard of care for pancreatic insufficiency. Lactase highly effective for lactose intolerance.

🦠 Gut Health
2 studies

Ginger

Grade A12 g

Excellent evidence for anti-nausea effects (pregnancy, chemotherapy, post-op). Also anti-inflammatory with COX-2 inhibition.

🦠 Gut Health🛡️ Immunity
3 studies

Elderberry

Grade B1560 mL syrup

Antiviral berry extract that reduces cold duration by ~2 days and flu by ~4 days. Use standardized syrup, never raw berries.

🛡️ Immunity
3 studies

Beta-Glucan

Grade B250500 mg

Dual-purpose supplement: yeast-derived for immune support (250mg), oat-derived for cholesterol (3g). Both well-supported by RCTs.

🛡️ Immunity❤️ Heart Health
2 studies

Holy Basil (Tulsi)

Grade B300600 mg

Ayurvedic adaptogen with evidence for stress reduction and blood glucose stabilization. Gentle daily-use herb.

🧘 Stress & Anxiety🛡️ Immunity
2 studies

Reishi

Grade B15003000 mg

Calming medicinal mushroom with immune-modulating and cancer-fatigue benefits. Best taken evening for sleep support.

🧘 Stress & Anxiety🛡️ Immunity🌙 Sleep
2 studies

Schisandra

Grade B5002000 mg

Adaptogen with liver-protective properties and military/Olympic athlete research for stress performance. CYP3A4 interactions are significant.

🧘 Stress & Anxiety Energy
2 studiesHigh-risk interactions

Lemon Balm

Grade B300600 mg

Gentle anxiolytic herb that provides calmness without sedation. Pairs well with valerian for sleep. Watch thyroid interactions.

🧘 Stress & Anxiety🌙 Sleep🧠 Cognitive Performance
2 studies

Kava

Grade A120280 mg kavalactones

Cochrane-validated anxiolytic: significant anxiety reduction comparable to benzodiazepines. Use noble cultivar water extracts to minimize liver risk.

🧘 Stress & Anxiety🌙 Sleep
2 studiesHigh-risk interactions

Garlic / Allicin

Grade A6001200 mg aged garlic extract

Strong RCT evidence for blood pressure reduction (~8-9/5-6 mmHg) and cold prevention (64% reduction). Aged extract preferred for CV.

❤️ Heart Health🛡️ Immunity
3 studiesHigh-risk interactions

Bergamot

Grade B5001000 mg BPF

Impressive lipid-modifying polyphenol: 30% LDL reduction in RCTs. Natural HMG-CoA reductase inhibitor (statin-like mechanism).

❤️ Heart Health
2 studies

Nattokinase

Grade B20004000 FU (fibrinolytic units)

Direct fibrinolytic enzyme from natto. Reduces blood pressure and DVT risk. Use with extreme caution regarding bleeding.

❤️ Heart Health
2 studiesHigh-risk interactions

Hawthorn

Grade B1601800 mg WS 1442

Cochrane-reviewed for heart failure (NYHA I-II): improves exercise tolerance and symptoms. Modest blood pressure reduction.

❤️ Heart Health
2 studies

Red Yeast Rice

Grade A12002400 mg

Natural statin alternative with 15-25% LDL reduction. 45% coronary event reduction in large RCT. MUST co-supplement CoQ10.

❤️ Heart Health
3 studiesHigh-risk interactions