Head to head · Hair, Skin & Nails
Nutrafol Women Hair Growth Nutraceutical vs OLLY Undeniable Beauty
Nutrafol scores higher overall (6.9 vs 6.8 out of 10), mainly on efficacy and quality & purity. OLLY still leads on value, experience and transparency.
Updated September 2026 from our full reviews · How we score
Dermatologist-favorite hair supplement, NSF Certified for Sport and now biotin-free and vegan; backed by company-funded trials but $88 a month and built on proprietary blends.
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An NSF-certified grapefruit gummy with 2,500 mcg biotin, 50 mg keratin and vitamins C and E: well made and well liked, but backed by weak hair-and-nail evidence.
We may earn a commission when you buy through these links — it never affects our scores. How we make money
We may earn a commission when you buy through these links — it never affects our scores. How we make money
The short answer
Choose Nutrafol if…
- Women 18-44 with stress- or lifestyle-related thinning
- Athletes who need NSF Certified for Sport products
- People who want a biotin-free hair supplement
- You care most about efficacy, quality & purity
Choose OLLY if…
- Shoppers who want an independently certified beauty gummy
- People who prefer a tasty chewable over pills
- Nail-focused users willing to run a two-to-three-month trial
- You care most about value, experience, transparency
Side by side
| Women Hair Growth Nutraceutical | Undeniable Beauty | |
|---|---|---|
| Our score | 6.9 / 10 | 6.8 / 10 |
| Efficacy (30%) | 7.4 | 4.7 |
| Quality & Purity (25%) | 9.0 | 8.3 |
| Value (20%) | 4.5 | 6.8 |
| Experience (15%) | 6.8 | 8.0 |
| Transparency (10%) | 5.5 | 8.0 |
| Form | Capsule | Gummy |
| Serving | 4 capsules30 servings per container | 2 gummies30 servings per container |
| Price per serving | $2.93 | See retailer |
| Testing & certifications | NSF Certified for Sport | NSF Contents Certified |
| Dietary | Vegan, Gluten-free | Gluten-free |
| Key ingredients |
|
|
| Flavors | — | 1 (Grapefruit Glam) |
| Creator video reviews | 4 | 4 |
Pros and cons
Women Hair Growth Nutraceutical
- NSF Certified for Sport (brand and NSF listings)
- Biotin-free, so no biotin-related lab test interference from this product
- Controlled trial of the original formula and a favorable 2023 systematic review
- Vegan formula with smaller capsules
- Widely recommended by dermatologist creators
- $88 per month, among the most expensive supplements in any category
- Ingredients sit in proprietary complexes without individual doses
- Four capsules a day; some buyers report stomach upset or diarrhea
- New formula's clinical results not yet peer-reviewed
Undeniable Beauty
- Certified to NSF/ANSI 173, so label contents are verified and contaminants screened
- Fully disclosed label, including the 50 mg keratin dose
- Natural-source vitamin E and no synthetic flavors or colors
- 4.5-star average across 14,000+ buyer ratings, with frequent praise for the taste
- Biotin at 8,333% DV has little evidence of benefit unless you are deficient
- Keratin dose is one-tenth of the 500 mg used in a published solubilized-keratin trial
- Costs more than twice as much per day as Nature's Bounty's similar biotin gummy
- Contains gelatin and 2 g of added sugar; some buyers report breakouts
Our verdicts
Women Hair Growth Nutraceutical
Nutrafol Women is the most credible of the heavily marketed hair supplements: NSF Certified for Sport, dermatologist-endorsed and supported by a controlled trial of its original formula. But it costs about $1,000 a year, hides doses in proprietary blends, and its new biotin-free formula has less published evidence. Get a diagnosis first, and try it for six months only if the budget allows.
Full review
Undeniable Beauty
Undeniable Beauty is one of the better-made beauty gummies: NSF certified, fully disclosed and widely liked for its taste. But it relies on the same high-dose biotin as cheaper rivals, and its 50 mg of keratin is a fraction of the studied amount. Think of it as a pleasant daily habit, not a fix for thinning hair.
Full review
What creators say
Questions people ask
Is Nutrafol better than OLLY?
Are Nutrafol and OLLY third-party tested?
Who should choose Nutrafol over OLLY?
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