Reference

Verdicts

One compound, one answer. Evergreen reference pages on supplements, nutrients and food ingredients: what the evidence supports, what it does not, and how much any of it matters.

A heap of pale dried ashwagandha roots on a patterned market cloth

Ashwagandha: uses, evidence, dosing and safety

Aug 3, 2026

Red barberry berries hanging from a thorned branch against soft green foliage

Berberine: uses, evidence, dosing and safety

Aug 3, 2026

A glass of milk on a pale speckled surface

Calcium supplements: uses, evidence, dosing and safety

Aug 6, 2026

Golden softgel capsules scattered across a white surface

Coenzyme Q10: uses, evidence, dosing and safety

Aug 5, 2026

A macro close-up of human skin texture with fine hairs

Collagen: uses, evidence, dosing and safety

Aug 6, 2026

A spoonful of white powder lifted from a glass storage jar on a wooden bench

Creatine: uses, evidence, dosing and safety

Jul 22, 2026

A pregnant woman in a coat resting both hands on her bump

Inositol: uses, evidence, dosing and safety

Aug 6, 2026

Cuts of raw red beef on a butcher counter

Iron supplements: uses, evidence, dosing and safety

Aug 6, 2026

Almonds and walnut halves scattered across a pale surface

Magnesium: uses, evidence, dosing and safety

Aug 6, 2026

A person asleep in bed under warm low light

Melatonin: uses, evidence, dosing and safety

Aug 5, 2026

Grey capsules spilled from a clear bottle onto a yellow background

NAC: uses, evidence, dosing and safety

Aug 5, 2026

White powder being weighed on an antique brass apothecary balance

NMN and NR: uses, evidence, dosing and safety

Aug 5, 2026

Two salted salmon fillets on dark slate with lemon wedges and rosemary

Omega-3 and fish oil: uses, evidence, dosing and safety

Aug 6, 2026

A white bowl of fresh eggs on a wooden table

Phosphatidylcholine: uses, evidence, dosing and safety

Jul 22, 2026

A bowl of plain yogurt with strawberries and blueberries on a wooden table

Probiotics: uses, evidence, dosing and safety

Aug 6, 2026

Bunches of dark red grapes hanging on the vine among green leaves

Resveratrol: uses, evidence, dosing and safety

Aug 6, 2026

Two cupped hands holding dark soil above a field

Selenium: uses, evidence, dosing and safety

Aug 5, 2026

A yellow St Johns wort flower with long radiating stamens

St Johns wort: uses, evidence, dosing and safety

Aug 5, 2026

Ground turmeric filling an open sack, with fragments of dried root through it

Turmeric and curcumin: uses, evidence, dosing and safety

Aug 3, 2026

Sliced raw beef resting on a wooden board in a dark kitchen

Vitamin B12: uses, evidence, dosing and safety

Aug 3, 2026

Halved oranges and a grapefruit packed together, cut sides up

Vitamin C: uses, evidence, dosing and safety

Aug 6, 2026

Sunlight dappled through a straw hat across a face

Vitamin D: uses, evidence, dosing and safety

Aug 6, 2026

Fresh oysters on the half shell arranged on a platter of crushed ice

Zinc: uses, evidence, dosing and safety

Aug 3, 2026