Compounds & Supplements

Supplements Database

Supplements range from essential nutrients to isolated plant compounds. Here you’ll find 104 profiles covering vitamins, minerals, amino acids, and more — with their uses, dosages, and supporting research.

Filter by function to start with what you’d actually take one for.

All Supplements

104 supplements

Every published supplement, listed alphabetically. Pick a function above to read what it's for and the kinds of compounds used — then narrow by class and action in the sidebar.

104 supplements
Caution Natural

Amino Acid

5-HTP

NootropicSerotonergic
Caution Natural

Alkaloid

9-Me-BC (9-Methyl-β-carboline)

NootropicDopaminergicNeuroprotectant
Natural

Amino Acid

Acetyl-L-Carnitine (ALCAR)

NootropicAntioxidant
Natural

Amino Acid

Agmatine (sulfate)

NootropicNeuroprotectant
Caution Essential

Lipid

Alpha-GPC

NootropicCholinergic
Synthetic

Synthetic

Aniracetam

NootropicCholinergic
Natural

Alkaloid

Berberine

NootropicMetabolicAntimicrobialAnti-inflammatory
Natural

Amino Acid

Beta-Alanine

Nootropic
Natural

Amino Acid

Betaine (TMG)

Nootropic
Natural

Cofactor

Bio PQQ

NootropicAntioxidantNeuroprotectant
Caution Synthetic

Synthetic

Bromantane

NootropicStimulantDopaminergic
Caution Natural

Alkaloid

Caffeine

NootropicStimulant
Caution Synthetic

Synthetic

Centrophenoxine

NootropicCholinergicNeuroprotectant
Essential

Vitamin

Choline

NutrientCholinergic
Essential

Cofactor

Citicoline (CDP-Choline)

NootropicCholinergicNeuroprotectant
Essential

Cofactor

Coenzyme Q10 (Ubiquinone)

NootropicAntioxidant
Natural

Peptide

Collagen peptides

Nootropic
Synthetic

Synthetic

Coluracetam

NootropicCholinergic
Caution Essential

Mineral

Copper

Nutrient
Essential

Amino Acid

Creatine

Nootropic
Natural

Polyphenol

Curcumin (turmeric extract)

NootropicAnti-inflammatoryAntioxidant
Essential

Lipid

DHA (Docosahexaenoic acid)

NootropicNeuroprotectant
Natural

Amino Acid

DL-Phenylalanine

NootropicDopaminergic
Synthetic

Synthetic

DMAE

NootropicCholinergic
Essential

Amino Acid

EAAs (essential amino acids)

Nootropic
Synthetic

Synthetic

Fasoracetam

Nootropic
Caution Essential

Mineral

Ferrous Fumarate

Nutrient
Caution Essential

Mineral

Ferrous Gluconate

Nutrient
Caution Essential

Mineral

Ferrous Sulfate

Nutrient
Essential

Lipid

Fish Oil (EPA/DHA)

Nootropic
Natural

Amino Acid

GABA

NootropicAnxiolytic
Natural

Peptide

Glutathione (reduced)

NootropicAntioxidant
Natural

Amino Acid

Glycine

Nootropic
Natural

Carbohydrate

Gum Arabic

NootropicAnti-inflammatoryMetabolic
Caution Natural

Alkaloid

Huperzine-A

NootropicCholinergicNeuroprotectant
Essential

Carbohydrate

Inositol

NootropicAnxiolytic
Caution Essential

Mineral

Iodine

Nutrient
Caution Essential

Mineral

Iron Bisglycinate

Nutrient
Natural

Amino Acid

L-Alanine

Nootropic
Natural

Amino Acid

L-Arginine

NootropicVasodilator
Natural

Amino Acid

L-Asparagine

Nootropic
Natural

Amino Acid

L-Aspartic Acid

Nootropic
Essential

Amino Acid

L-Carnitine

NootropicAntioxidantNeuroprotectant
Natural

Amino Acid

L-Citrulline (malate)

NootropicVasodilator
Natural

Amino Acid

L-Cysteine

NootropicAntioxidant
Natural

Amino Acid

L-Glutamic Acid

Nootropic
Natural

Amino Acid

L-Glutamine

Nootropic
Natural

Amino Acid

L-Histidine

Nootropic
Natural

Amino Acid

L-Isoleucine

Nootropic
Natural

Amino Acid

L-Leucine

Nootropic
Natural

Amino Acid

L-Lysine

Nootropic
Natural

Amino Acid

L-Methionine

Nootropic
Natural

Amino Acid

L-Ornithine

Nootropic
Natural

Amino Acid

L-Proline

Nootropic
Natural

Amino Acid

L-Serine

Nootropic
Natural

Amino Acid

L-Theanine

NootropicAnxiolytic
Natural

Amino Acid

L-Threonine

Nootropic
Natural

Amino Acid

L-Tryptophan

NootropicSerotonergic
Essential

Amino Acid

L-Tyrosine

NootropicDopaminergic
Natural

Amino Acid

L-Valine

Nootropic
Essential

Mineral

Magnesium Citrate

Nutrient
Essential

Mineral

Magnesium Glycinate

Nutrient
Essential

Mineral

Magnesium L-Threonate

Nutrient
Natural

Hormone

Melatonin

Nootropic
Synthetic

Amino Acid

N-Acetylcysteine (NAC)

NootropicAntioxidant
Caution Synthetic

Synthetic

Nefiracetam

NootropicCholinergic
Essential

Cofactor

NMN (Nicotinamide mononucleotide)

Nootropic
Synthetic

Peptide

Noopept

NootropicNeuroprotectant
Synthetic

Synthetic

Oxiracetam

NootropicCholinergic
Caution Synthetic

Synthetic

Phenibut

NootropicAnxiolytic
Caution Synthetic

Synthetic

Phenylpiracetam

NootropicStimulant
Essential

Lipid

Phosphatidylcholine

NootropicCholinergic
Essential

Lipid

Phosphatidylserine

NootropicNeuroprotectant
Synthetic

Synthetic

Picamilon

NootropicAnxiolyticVasodilator
Synthetic

Synthetic

Piracetam

Nootropic
Synthetic

Synthetic

Pramiracetam

NootropicCholinergic
Synthetic

Synthetic

PRL-8-53

Nootropic
Natural

Probiotic

Probiotics (multi-strain)

Nootropic
Natural

Polyphenol

Pterostilbene

NootropicAntioxidantNeuroprotectant
Caution Natural

Amino Acid

SAM-e (S-Adenosylmethionine)

Nootropic
Natural

Amino Acid

Sarcosine

Nootropic
Caution Essential

Mineral

Selenium

Nutrient
Synthetic

Synthetic

Sulbutiamine

Nootropic
Synthetic

Synthetic

Sunifiram

Nootropic
Natural

Amino Acid

Taurine

NootropicAntioxidant
Essential

Cofactor

Uridine Monophosphate

NootropicNeuroprotectant
Caution Synthetic

Alkaloid

Vinpocetine

NootropicVasodilatorNeuroprotectant
Essential

Vitamin

Vitamin B1 (Thiamine)

Nutrient
Essential

Vitamin

Vitamin B12

Nutrient
Essential

Vitamin

Vitamin B2 (Riboflavin)

Nutrient
Essential

Vitamin

Vitamin B3 (Niacin / Niacinamide)

Nutrient
Caution Essential

Vitamin

Vitamin B6

Nutrient
Essential

Vitamin

Vitamin B9

Nutrient
Essential

Vitamin

Vitamin C (Ascorbic acid)

NutrientAntioxidant
Caution Essential

Vitamin

Vitamin D2 (Ergocalciferol)

Nutrient
Essential

Vitamin

Vitamin D3 (Cholecalciferol)

Nutrient
Caution Essential

Vitamin

Vitamin E

Nutrient
Essential

Mineral

Zinc Acetate

Nutrient
Essential

Mineral

Zinc Bisglycinate

Nutrient
Essential

Mineral

Zinc Citrate

Nutrient
Essential

Mineral

Zinc Gluconate

Nutrient
Caution Essential

Mineral

Zinc Oxide

Nutrient
Essential

Mineral

Zinc Picolinate

Nutrient
Essential

Mineral

Zinc Sulfate

Nutrient

The Difference

Supplements Are Easier to Define Than Herbs

A herb contains dozens or hundreds of compounds in proportions determined by the plant.

A supplement is usually much narrower: a defined nutrient, molecule, extract, or chemical form given at a measurable dose.

That makes supplements easier to study.

You can usually say exactly what was taken, how much was taken, and whether the same dose can be repeated.

It also means the dose can move far beyond what would ever occur naturally in food or a plant.

An isolated compound at 100 times its natural concentration shouldn’t automatically inherit the safety profile of the plant it came from.

Whole herbs have their own advantage.

Their constituents occur together, and those combinations can change absorption, metabolism, tolerance, and overall effect.

Neither form is inherently better.

They’re simply different kinds of medicine and need to be judged differently.

Forms

The Form Matters

“Magnesium” isn’t one product.

Magnesium citrate, magnesium glycinate, and magnesium L-threonate all supply magnesium, but they differ in absorption, gastrointestinal effects, cost, and the claims made for them.

The same problem appears with many supplements.

25 pages cover different forms of 5 parent compounds.

The parent page explains the substance itself.

The form page explains what changes when you switch salts, chelates, esters, or delivery forms.

For many supplements, the form is just as important as the dose.

A stack is the other case where one label covers several substances. ZMA is zinc, magnesium and vitamin B6 in a single tablet, so what it does — and who it helps — depends on all three.

A Caution

Not Everything Sold Like a Supplement Is One

Some compounds sit in a grey area between supplements, research chemicals, and drugs.

This database includes pages for 39 of them because people are already using and searching for them.

But they aren’t listed alongside ordinary nutrients and supplements when their regulatory status or safety record is fundamentally different.

That includes 28 research chemicals, 6 compounds still in clinical development, and 5 drugs approved in some countries but not others.

If something is mostly discussed on forums rather than sold as an ordinary nutrient, check what category it actually belongs to before treating it like a supplement.

Evidence

How to Read the Evidence

The most reliable supplement effects are usually the simplest ones: correcting a genuine deficiency.

Iron works when iron is deficient. Vitamin B12 works when B12 is deficient. Vitamin D is most useful when vitamin D status is low.

Once nutritional sufficiency is reached, taking more often produces much smaller returns.

Sometimes it produces none.

And with fat-soluble vitamins and several minerals, excessive intake can cause harm.

The evidence becomes less predictable as the claims move away from deficiency correction.

Nootropics are a good example — 28 of the 104 compounds here carry that tag, the largest group on the page.

Many have interesting mechanisms, animal data, or early human studies, but far fewer have strong evidence for meaningful cognitive improvement in healthy people.

That doesn’t mean the compound does nothing.

It means the claim needs to match the evidence behind it.

Level of Evidence

Weaker → stronger

  1. In vitro

    Cells, enzymes or bacteria in a dish. Shows that a compound can do something, and often how. It says nothing about what survives digestion.

  2. Animal studies

    A whole living system, with absorption, metabolism and a real dose. Establishes pharmacological activity and toxicity — in a body that is not ours.

  3. Observational

    Real people, watched rather than assigned: case reports, surveys, cohorts. Good at finding patterns and harms, poor at proving cause.

  4. Randomised trial

    People assigned at random to the herb or a placebo. The first design that can show the herb itself caused the effect — at one dose, in one population.

  5. Meta-analysis

    Every trial on a question gathered, graded and weighed together. Shows whether a result holds across researchers, preparations and populations.

Each level answers a different question. A finding in cells is a lead. A meta-analysis is closer to a verdict.

Each supplement page separates mechanism, human evidence, dose, and practical use so you can see where that line sits.

Elsewhere

Related Indexes

  • Plant Constituents — browse the same molecules as components of medicinal plants.
  • Nootropics — compounds used for cognition, memory, focus, and mental performance.
  • Peptides — peptide compounds and related research.
  • Explore the Herbs — the whole-plant side of the site.
  • Conditions — start with the problem rather than the compound.

Justin Cooke

Clinical herbalist and the writer behind The Sunlight Experiment — an evidence-based pharmacopoeia of herbs, supplements, and the chemistry behind them.

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