Best Hair, Skin and Nails Vitamins
The best hair, skin and nails vitamin for most people is NutraHarmony Biotin, Collagen & Keratin: an outside lab checked its label (NSF/ANSI 173), and it costs $0.93 a day. For the lowest cost, buy NatureWise Hair, Skin & Nails at $0.30 a day. These vitamins help most if you are low in a nutrient.
By Erin Rose Updated October 21, 2026 How we score
Costs are brand prices per day, checked October 21, 2026.
Our pick for: Most people
NutraHarmony Biotin, Collagen & Keratin
7.5/10 Our score
Tied for the top score of the 12 we score, and the only one of those on an outside testing list
- Testing list
- NSF/ANSI 173An outside lab checks the bottle holds what the label says
- Biotin
- 5,000 mcg167 times the 30 mcg adults need
- Collagen
- 310 mgFrom fish
- A day
- $0.93Brand price; Amazon’s can differ
- Bottle we link
- 60 capsules, 30 days2 capsules a day
- Hidden amounts
- 400 mg blendKeratin, MSM and 4 plants, no amounts given
Why we pick it It is one of only 2 of the 12 we score that are on a public testing list. NSF checked that the capsules hold what the label says and have no harmful levels of contaminants. The other one, Nutrafol, costs about 3 times as much a day.
What you give up It costs more than the cheapest bottles, a 400 mg blend hides how much keratin you get, its 5,000 mcg of biotin is far more than you need (tell your doctor before blood tests), and it has no zinc or iron. If you do not need proof the bottle matches its label, the budget pick has both at about a third of the price.
Which one is right for you?
Most are biotin plus a few vitamins and minerals, so the labels look alike. We compare what you can check: testing, cost a day, and hidden amounts.
Want the lowest cost that still scores well?
NatureWise Hair, Skin & Nails ties our pick on score at $0.30 a day. Its label states every amount, with no blend, and it adds zinc (11.25 mg), iron (5 mg) and vitamin D. Iron is best taken when a blood test shows you are low. The catch: its “Third Party Tested” badge does not say which lab, and it is on no public list. The cheapest we score is Nature Made Hair, Skin & Nails at $0.21 a day, also on no list.
NatureWise Hair, Skin & Nails
7.5/10 · $0.30 a day · 3 softgels
Prefer a gummy?
Nature’s Bounty Hair, Skin & Nails Gummies is the top-scoring gummy at $0.22 a day, with 2,500 mcg of biotin and 2 g of sugar. Gummies hold fewer minerals than softgels: this one has no zinc or iron. Well-known gummies like WEEM ($1.00 a day) and OLLY ($0.47) cost more for a similar label.
Nature’s Bounty Hair, Skin & Nails Gummies
7.0/10 · $0.22 a day · 2 gummies
Thinning hair and want a brand with its own trials?
Nutrafol Women is on NSF Certified for Sport and has small trials with authors from the company. It has no biotin. Most of what sets it apart sits in two blends with no amounts. It costs $2.93 a day, 14 times the cheapest we score. Hair loss has many causes, so a doctor visit comes first.
Nutrafol Women
7.0/10 · $2.93 a day · 4 capsules · NSF Certified for Sport
Getting blood work soon?
High doses of biotin can make some lab tests read wrong, including thyroid and heart tests, the FDA warns. Tell your doctor you take biotin before any blood test. 6 of the 12 products here hold 5,000 mcg or more a day. Pregnant or breastfeeding? Ask your doctor before taking any of these.
Hair, skin and nails vitamins we scored, ranked
We chose the best-selling hair, skin and nails vitamins on Amazon that we could price at the brand’s own store, then scored all 12 on dose, testing, cost, label and recalls. Here they are, our pick first, then by score, with why each one is or is not a pick. Costs are per day at each brand’s own price. Products with the same score are listed by cost.
| Product | A day | Why it is or is not a pick |
|---|---|---|
| NutraHarmony Biotin, Collagen & Keratin7.5/10 | $0.93 | Our pick: on NSF/ANSI 173, an outside check that the bottle matches its label |
| NatureWise Hair, Skin & Nails7.5/10 | $0.30 | Budget pick: ties our pick on score, every amount stated; its test badge does not say which lab |
| Nature Made Hair, Skin & Nails7.0/10 | $0.21 | The cheapest a day; zinc 11 mg; on no testing list |
| Nature’s Bounty Hair, Skin & Nails Gummies7.0/10 | $0.22 | Top gummy; 2 g sugar a day; no zinc or iron |
| Nutrafol Women7.0/10 | $2.93 | On NSF Certified for Sport, but blends hide its amounts and it costs 14 times the cheapest |
| OLLY Undeniable Beauty6.5/10 | $0.47 | Says NSF certified; this product is not on NSF’s lists |
| Black Girl Vitamins Hair, Skin & Nails6.5/10 | $0.83 | Shows an NSF badge; this product is not on NSF’s list; 6,000 mcg biotin |
| Nature’s Bounty Hair, Skin & Nails Softgels6.0/10 | $0.29 | Same biotin as our budget pick; “Laboratory Tested” names no outside lab |
| vitafusion Hair, Skin & Nails Gummies5.0/10 | $0.45 | 7 g sugar a day, the most here; no testing claim |
| MaryRuth’s Hair, Skin & Nails Gummies5.0/10 | $0.83 | Organic gummy; 4 g sugar a day; no testing claim |
| WEEM Hair, Skin & Nails Gummies5.0/10 | $1.00 | Well known, but 4.8 times the cheapest a day and no testing claim |
| Viviscal Women4.5/10 | $1.33 | Marine protein blend with no split; no testing claim |
Do they work?
Mostly when you are low in something they contain. Biotin shortfalls are very rare in the US, and there is little evidence for its hair, skin and nail claims in healthy people (NIH; Patel 2017). For brittle nails, three small trials with no placebo group found harder nails at 2,500 mcg a day (NIH; Lipner 2018).
For hair loss, reviews say to fix low iron, zinc or vitamin D when a blood test finds it, not to take them blind (Almohanna 2019). A ferritin test shows whether low iron could be the cause (Zhang 2023). Branded formulas did better than a placebo in small trials that the makers took part in: Viviscal Extra Strength in 60 women and an older Nutrafol Women formula in 40 (Ablon 2015, 2018). A 2026 review of 14 studies found more hairs in the growing phase than with a placebo, but no clear gain in total hair count (Alanazi 2026).
For skin, collagen powder has the best evidence. Skin trials gave about 3.5 to 4 g a day (Danessa 2025). The vitamins on this page hold 0.31 g of collagen a day or less, plus Viviscal’s 0.9 g marine blend that does not say how much is collagen.
How to read the label
Check three things. First, biotin: adults need about 30 mcg a day, and most labels hold 2,500 to 6,000 mcg, so a higher number is not a better product. Second, the minerals that matter when you are low: iron and zinc. Many gummies have little or none. Third, the word “blend.” A blend lists ingredients without amounts, so you cannot tell how much you get.
Questions people ask
Should I get a blood test first?
If your hair is thinning, yes. Ask a doctor to check your iron (ferritin) and vitamin D. Stop or mention biotin before the test, since it can skew some results.
Is 5,000 mcg of biotin too much?
There is no set upper limit for biotin, and we found no study showing that more grows more hair. Adults need about 30 mcg a day. The real risk is lab tests, covered above.
Does the collagen in these do anything?
Probably not much. The ones that list collagen hold 0.31 g a day or less, and Viviscal’s 0.9 g marine blend does not say how much is collagen. Skin trials gave about 3.5 to 4 g a day of collagen powder. If collagen is what you want, see collagen for skin.
How we score
Five marks: a day stays under every safe upper limit we can check; the product is on a public testing list (a brand’s own claim earns half); a day’s cost at the brand’s price against the cheapest; the label states every amount; and the brand’s FDA recall record. Dose and testing are worth up to 3 points each, cost 2, label and recalls 1 each. More biotin earns no points. Our method.
Sources
- NIH Office of Dietary Supplements. “Biotin: Fact Sheet for Consumers” and “Biotin: Fact Sheet for Health Professionals.” ods.od.nih.gov
- US Food and Drug Administration. “Biotin Interference with Troponin Lab Tests.” fda.gov
- American Academy of Dermatology. “Supplements for your skin, hair, and nails.” aad.org
- Patel DP, et al. “A Review of the Use of Biotin for Hair Loss.” Skin Appendage Disord. 2017. PubMed 28879195
- Lipner SR. “Biotin for the treatment of nail disease: what is the evidence?” J Dermatolog Treat. 2018. PubMed 29057689
- Almohanna HM, et al. “The Role of Vitamins and Minerals in Hair Loss: A Review.” Dermatol Ther (Heidelb). 2019. PubMed 30547302
- Zhang D, et al. “Serum Ferritin Levels: A Clinical Guide in Patients With Hair Loss.” Cutis. 2023. PubMed 37820340
- Ablon G. “A 3-month, randomized, double-blind, placebo-controlled study evaluating the ability of an extra-strength marine protein supplement to promote hair growth and decrease shedding in women with self-perceived thinning hair.” Dermatol Res Pract. 2015. Funded by the maker. PubMed 25883641
- Ablon G, Kogan S. “A Six-Month, Randomized, Double-Blind, Placebo-Controlled Study Evaluating the Safety and Efficacy of a Nutraceutical Supplement for Promoting Hair Growth in Women With Self-Perceived Thinning Hair.” J Drugs Dermatol. 2018. PubMed 29742189
- Alanazi R, et al. “Evaluating the Effectiveness of Commercial Oral Supplements for Hair Growth: A Systematic Review and Meta-Analysis.” J Cosmet Dermatol. 2026. PubMed 41954038
- Danessa G, et al. “Effects of collagen-based supplements on skin's hydration and elasticity: A systematic review and meta-analysis.” Indian J Dermatol Venereol Leprol. 2025. PubMed 40826844
- Testing lists: NSF/ANSI 173 and NSF Certified for Sport, read October 21, 2026. Label facts from each brand’s own page or the NIH label database.