HUM Nutrition Hair Strong Review

Hair Strong by HUM Nutrition is a clinically proven formula designed for Hair + Nails to support improved hair growth, fuller hair, and stronger hair. Rather than only testing individual ingredients, HUM Nutrition tests its bestselling formulas in randomized, placebo-controlled human clinical trials to ensure rigorous science and measurable results. In clinical studies of this formula, 94% of participants saw improved hair strength and 89% self-reported faster hair growth. The supplement is formulated by RD Nutritionists using verified clean ingredients and clinically tested actives. Every batch is triple tested and third-party validated for purity and quality, and the formula is completely free of The Tricky 12, containing no artificial colors, sweeteners, flavors, or preservatives. What's inside Hair Strong includes six primary active components tailored for hair follicle and strand health. First, Biotin serves as a key nutrient in maintaining the health of both hair and nails. Second, Vitamin B12 is included because studies suggest that this vitamin can play an important role in supporting healthy hair follicles. Third, adequate amounts of Folic Acid are provided, as they are key for healthy hair growth. Fourth, Zinc is incorporated as a vital mineral necessary for healthy hair follicles. Fifth, Fo-Ti, an herb used in traditional Chinese medicine, is included to support healthy hair growth and boost natural hair color. Sixth, PABA is added because some evidence shows that it can help maintain natural hair color. According to the product FAQs, Hair Strong Capsules and Hair Strong Gummies offer the exact same clinically tested formula for improved hair growth, meaning it is not necessary to take both and customers should simply choose one formula to support healthier hair. However, Hair Strong Capsules can be taken alongside HUM Nutrition's Red Carpet, as they make a great duo where Hair Strong Capsules improve hair strength and growth while Red Carpet nourishes hair follicles for healthy hair.

Product Focus: Hair Growth
Tier ⓘ
Members see this product's tier and why. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
Biohacker Mentions
Cost per month
$27

Study, Trial or Testing Result Summary

MembersHuman studies

1 of these 59 human studies gave the ingredient by injection, not by mouth.

This product provides a 5000 microgram dose of biotin, the 1.25 milligram daily dose that hair fall and sped up hair growth in a 90-day randomized trial of 105 adults. Weekly biotin injections with another vitamin also hair density in 50 people, and 10 milligrams of oral biotin resolved medication-related hair in children. …

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Review Totals and Summary

Members1,613 reviews
1,613 reviews · HUM Nutrition 1,223 · Target 209 · Grove Collaborative 181

Customer feedback for HUM Nutrition Hair , encompassing both the capsule and gummy versions, reveals recurring qualitative themes regarding its efficacy and user experience. A number of users consistently report outcomes related to hair growth and strength. …

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Biohacker Summary

MembersWhat our biohacker panel says

The two who it do so for hair, one saying it supports keratin and strengthens hair, the other saying it hair follicle and growth. One of the two who calls it overhyped and says protein is probably useful for hair, skin and nails. …

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RAL Summary

MembersThe tier and why

More Details

MembersBody systems · Combine with · Possible side effects

Body systems: Integumentary system. Combine with and possible side are for members.

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Supplement Facts

Folate 500 mcg DFE · Vitamin B12 850 mcg · Biotin 5000 mcg
Supplement Facts
Serving Size 1 Capsule
Servings Per Container 30
Amount Per Serving% Daily Value
Folate (from folic acid)500 mcg DFE125%
Vitamin B12 (as methylcobalamin)850 mcg35,417%
Biotin (as d-biotin)5,000 mcg16,667%
Zinc (as zinc citrate)20 mg182%
PABA (Para-aminobenzoic acid)15 mg†
Fo-Ti (Polygonum multiflorum) root extract10 mg†
† Daily Value not established.

Other ingredients: Hypromellose (capsule), rice flour, organic rice bran extract.

Directions: Take 1 capsule daily.

Label source: Vitacost · Report a label change

Where to Buy

HUM Nutrition · Target
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More hair growth products

MembersThe highest ranked for the same goal

Graded October 26, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.