Best supplements for hair.

Supplements that support stronger, healthier hair, and an honest note on when a deficiency (like iron) is the real cause.

Written to our editorial standards · reviewed against published research· Updated 2 Jun 2026
Each pick is evidence-graded · we don't sell supplements
  1. 1Zinc PicolinateStrongCritical for immune function, testosterone synthesis, taste, and skin health. Most modern diets fall short.15 mg · evening · ~$9/mo
  2. 2Collagen PeptidesStrongType I & III collagen from grass-fed beef. Supports skin elasticity, hair strength, nail growth, and joint repair.10 g · morning · ~$28/mo
  3. 3NiacinamideStrongThe non-flushing form of B3. Precursor to NAD+ for cellular energy and DNA repair. Topical-quality skin from within.500 mg · morning · ~$11/mo
  4. 4AstaxanthinStrongThe most powerful naturally-occurring antioxidant. Crosses the blood-brain and blood-retinal barriers. Supports skin elasticity from within.12 mg · morning · ~$22/mo
  5. 5Hyaluronic AcidStrongOral hyaluronic acid significantly improves skin hydration and elasticity. Also supports joint synovial fluid.120 mg · morning · ~$22/mo
  6. 6PycnogenolStrongOne of the most-studied flavonoid extracts. Strong evidence for circulation, skin elasticity, ADHD focus, and venous health.100 mg · morning · ~$35/mo
  7. 7SilicaStrongActivates the body's own collagen, elastin, and keratin synthesis enzymes. Strongest evidence for hair thickness and nail strength.10 mg choline-stabilized orthosilicic acid · morning · ~$38/mo
  8. 8Saw Palmetto ExtractModerateBerry extract that mildly inhibits 5-alpha-reductase. Used for prostate comfort and DHT-driven hair loss in men.320 mg standardised · morning · ~$16/mo
  9. 9DIMModerateActive compound concentrated from cruciferous vegetables. Supports favorable 2:16 ratio of estrogen metabolites, relevant for both women and men.100 mg · morning · ~$26/mo
  10. 10TocotrienolsStrongThe often-missing other half of the vitamin E family. Supports skin, lipid profile, liver health, and inflammation.150 mg · evening · ~$38/mo
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Common questions

What supplements help hair growth?
If you're deficient, correcting iron/ferritin, vitamin D and zinc often matters most. Collagen, biotin and silica support the hair matrix, though biotin only helps if you're low.
Does biotin really work for hair?
Biotin helps mainly in people who are genuinely deficient, which is uncommon. If your hair is thinning, check ferritin and thyroid first, a blood test is the fastest answer.

Educational use only, not medical advice. Always consult a qualified clinician before starting supplements, especially if you take medication or are pregnant or nursing.