Goal-Based Guide

Best Supplements for Hair Growth

For hair growth, the most support goes to correcting deficiencies, mainly zinc and iron. Omega-3 has broad support but not specifically for hair, and collagen is a weaker case. Here's what each one does.

Hair health is mostly set by genetics, hormones and nutrient status. These supplements address the nutritional factors that actually come up.

Verdicts are worked out from what researchers say in public videos. Not medical advice. Always consult your healthcare provider before starting, stopping, or changing any supplement.

Top Supplements for Hair Growth

Ranked by the verdict on whether each supplement works, worked out from every counted mention. Each dot is one source: a researcher or a study.

positive partly neutral negative Each researcher and each study counts once per claim, however often they come up.

  1. Omega-3

    Leaning for

    Omega-3 supplements are worth taking.

    +1 17 sources: 7 positive, 10 partly

    17 sources: 7 positive, 10 partly

  2. Zinc

    Leaning for

    Zinc supplements are worth taking.

    6 sources: 2 positive, 4 partly

    6 sources: 2 positive, 4 partly

  3. Iron

    Leaning for

    Iron supplements improve health only in people whose iron is low.

    4 sources: 1 positive, 3 partly

    4 sources: 1 positive, 3 partly

  4. Collagen

    Conflicting

    Collagen supplements are worth taking.

    7 sources: 3 positive, 2 partly, 2 negative

    7 sources: 3 positive, 2 partly, 2 negative

Precis is not affiliated with or endorsed by YouTube or by any researcher, show or publisher we quote. We take no sponsorship, ad or affiliate money, and every verdict is our own review of what was said. How we stay independent

Hair Health Foundation

Addressing nutritional factors that affect hair:

  • Iron - test ferritin first; deficiency is a common cause of hair loss, especially in women
  • Zinc - 15-30mg daily; essential for cell division in hair follicles
  • Omega-3 - reduces inflammation that can contribute to hair thinning
  • Collagen peptides - provides glycine and proline for structural proteins

Common Mistakes

  1. Taking biotin without testing for deficiency. Biotin deficiency is actually rare, and supplementation rarely helps unless you are deficient.
  2. Not checking iron and thyroid levels. These are the most common correctable causes of hair loss.
  3. Worrying about creatine causing hair loss. Researchers who study creatine have debunked that myth.
  4. Expecting supplements to override genetic pattern baldness. They address nutritional deficiencies, not androgenetic alopecia.

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This page shows you which supplements researchers agree on for hair growth. A free account opens the dose, form and timing for each supplement, with the interactions to watch. Pro adds chat answers drawn from 3,700+ hours of recorded interviews with 380 researchers and doctors, plus 48,500+ research studies, each one cited.

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