Nutrafol is one of the names every assistant and search result brings up for thinning hair, and "Nutrafol Women ingredients" is among the most-searched questions about it. The answer is on the label — partly. This page reads the declared Supplement Facts panel line by line, notes what the proprietary blends leave undisclosed, and sets out what has been published about the product and its ingredients. We have not taken it and make no claim about what it does for any individual.
Where the label comes from
Nutrafol's own ingredient page confirms Marine Collagen Peptides as part of its Synergen Complex. The per-serving panel below is the product label as recorded in the NIH Office of Dietary Supplements' Dietary Supplement Label Database (DSLD), entry 327463, "Women", dated 25 March 2025 — a copy of the label itself, not a summary. An earlier Women's label in the same database (entry 242472, January 2021) declares the same blend weights, so the formula has been stable across at least those two label versions.
The panel, as declared
Serving: four capsules, once daily with a meal; 120 capsules per bottle, so one bottle is 30 servings.
| Ingredient | Amount | % Daily Value |
|---|---|---|
| Vitamin A (as beta-carotene) | 1,500 mcg RAE | 167% |
| Vitamin C (ascorbic acid, camu camu) | 100 mg | 111% |
| Vitamin D3 | 62.5 mcg | 313% |
| Vitamin E (d-alpha-tocopherol) | 3.5 mg | 23% |
| Biotin | 3,000 mcg | 10,000% |
| Iodine (organic kelp) | 225 mcg | 150% |
| Zinc (amino acid chelate) | 25 mg | 227% |
| Selenium (amino acid chelate) | 200 mcg | 364% |
| Synergen Complex | 1.68 g | not established |
| Nutrafol Blend | 530 mg | not established |
Inside the Synergen Complex (1.68 g), in declared order: hydrolyzed marine collagen, Sensoril (ashwagandha), saw palmetto fruit extract, BCM-95 Bio-Curcumin (turmeric), palm fruit extract (tocotrienols) and hyaluronic acid.
Inside the Nutrafol Blend (530 mg): L-cysteine, L-lysine, L-methionine, keratin, horsetail, Japanese knotweed root extract, black pepper fruit extract and cayenne fruit extract.
The label's allergen line reads "Contains: Fish (cod, haddock, pollock)", which is the marine collagen. Its cautions say not to use it when pregnant or nursing, and to consult a doctor first when taking medication, "especially blood thinning drugs".
What the proprietary blends leave out
Each blend is declared by its total weight, with its ingredients listed in order and no individual amounts. The practical effect: fourteen of the product's named botanicals, amino acids and proteins have no declared amount.
The one firm inference concerns the collagen. It must be under 1.68 g per day, because five other ingredients share that weight. It is listed first in the Synergen Complex; if the blend follows the usual descending-weight order for blends, it is also the heaviest of the six, but the label does not state an amount. The oral collagen trials summarised on our collagen peptides for hair and skin page used 1 g, 2.5 g, 3 g and 5 g a day. Whether the amount here falls inside that range cannot be read off the label.
The vitamins and minerals, against the Daily Value
The label's own percentages are the clearest thing on it:
- Biotin, 3,000 mcg — 10,000% of the Daily Value. A systematic review of biotin for hair found 18 reported cases of benefit, all in people with an underlying cause such as deficiency or specific hair and nail disorders, and concluded there is not sufficient evidence for supplementation in healthy people (Patel 2017). High biotin intake also interferes with some laboratory tests that use biotin in their design — the subject of an FDA safety communication and of published laboratory guidance (Johnson 2019; Bowen 2019).
- Vitamin D3, 62.5 mcg (2,500 IU) — 313%. Selenium, 200 mcg — 364%. Zinc, 25 mg — 227%. These amounts are above the Daily Value on their own; anyone also taking a multivitamin adds to them.
- Vitamin A is declared as beta-carotene, the plant form, rather than preformed vitamin A (retinol).
Ingredient by ingredient
Each ingredient has its own evidence, and none of that evidence was generated on this combination except in the company's own trials (next section).
- Hydrolyzed marine collagen. The one peptide on the label: an oral, food-derived mixture of collagen fragments, not a topical signal peptide. The hair trials on oral collagen are small, recent and largely industry-run; our collagen peptides page counts them.
- Saw palmetto. Presented in the brand's materials as the ingredient aimed at DHT, the hormone behind pattern hair loss. Its amount here is undeclared, so no trial dose can be compared with it.
- Ashwagandha (Sensoril). Included as a stress adaptogen; the link between stress and hair shedding is the rationale, discussed in our page on stress and skin.
- Curcumin (BCM-95), tocotrienols, hyaluronic acid, keratin, horsetail, Japanese knotweed, amino acids. Each appears in the anti-inflammatory or antioxidant rationale the brand gives; none has an established hair-growth effect on its own as an oral supplement, and none has a declared amount.
The company's trials
ClinicalTrials.gov listed 7 registered studies of Nutrafol products on 30 September 2026 — sponsored by Nutraceutical Wellness Inc. (Nutrafol's maker) or run by research centres that published with it. All seven are marked completed; none has results posted to the registry, so the published papers are the only source for their outcomes.
The first Women's trial (Ablon and Kogan 2018; NCT03206567) randomized adult women with self-perceived thinning to Nutrafol Women's Capsules (26) or placebo (14) for six months. The paper reports significantly more terminal and vellus hairs in the target area at days 90 and 180 than on placebo, and "no reported adverse events". Forty participants with a 26:14 split is a small trial, and the product tested combines more than twenty ingredients, so the result is about the product as a whole — no ingredient can be credited individually.
A second trial of the Women's Balance formula for peri- and post-menopausal women (Ablon and Kogan 2021; NCT04048031) randomized 40 to the supplement and 30 to placebo. That is a different product from the one on this page.
An independent 2026 meta-analysis of commercial hair supplements, pooling 14 studies and 967 participants across eight products including Nutrafol, found improvements in several hair-density measures but no significant difference in total hair count (p = 0.06), and concluded that "more rigorous, independent research is needed" (Alanazi 2026).
Reports to FDA
FDA's database of adverse-event reports for foods, supplements and cosmetics (CAERS) held 395 reports naming Nutrafol on 30 September 2026. By year created: 1 (2018), 1 (2019), 3 (2021), 6 (2022), 67 (2023), 83 (2024), 171 (2025) and 63 (2026 so far).
| Most frequent coded terms | Reports |
|---|---|
| Hospitalisation | 54 |
| Increased liver enzymes | 48 |
| Emergency care | 41 |
| Nausea | 33 |
| Diarrhoea | 31 |
| Hypersensitivity | 31 |
| Kidney stones | 30 |
A CAERS report is an allegation, not a finding. It may name several products, may be incomplete, and does not establish that the product caused the event; report counts also rise with sales and with public awareness of how to file. What the record does show is that liver-enzyme and kidney-stone terms recur often enough to be among the most frequent entries. A doctor is the right person to assess any symptom and any supplement taken alongside medication.
What this label establishes
It establishes a product with one peptide ingredient, oral marine collagen, in an undeclared amount under 1.68 g; eight vitamins and minerals, several well above the Daily Value and biotin at a hundredfold; and fourteen botanicals, amino acids and proteins whose amounts are not disclosed. It establishes two small company-funded placebo trials of related formulas with no registry results, and a steadily growing file of unverified reports to FDA.
It does not establish whether the product works for any particular person, and this page makes no claim about that. The benchmarks against which any hair supplement is eventually measured — minoxidil and, for some, finasteride — are set out on our peptides for hair growth hub, and hair loss in women specifically on peptides for women's hair.
Sources
- NIH Office of Dietary Supplements, Dietary Supplement Label Database: Nutrafol "Women", label 327463 (entry 2025-03-25) and label 242472 (entry 2021-01-22), read 2026-09-30.
- Nutrafol, ingredients page (Marine Collagen Peptides, Synergen Complex), read 2026-09-30.
- ClinicalTrials.gov API v2, query "nutrafol": NCT06376409, NCT04048031, NCT03206567, NCT05332743, NCT03052413, NCT05339958, NCT06362941, read 2026-09-30.
- 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;17(5):558-565 — PMID 29742189.
- Ablon G, Kogan S. A Randomized, Double-Blind, Placebo-Controlled Study of a Nutraceutical Supplement for Promoting Hair Growth in Perimenopausal, Menopausal, and Postmenopausal Women With Thinning Hair. J Drugs Dermatol 2021;20(1):55-61 — PMID 33400421.
- Alanazi R, et al. Evaluating the Effectiveness of Commercial Oral Supplements for Hair Growth: A Systematic Review and Meta-Analysis. J Cosmet Dermatol 2026;25(4):e70817 — PMID 41954038.
- Patel DP, Swink SM, Castelo-Soccio L. A Review of the Use of Biotin for Hair Loss. Skin Appendage Disord 2017;3(3):166-169 — PMID 28879195.
- Johnson L, Li D. Strategies to Investigate Biotin Interference in Light of the FDA Safety Communication. J Appl Lab Med 2019;3(5):914-915 — PMID 31639768. Bowen R, et al. Review of biotin interference with laboratory testing and its mitigation. Clin Biochem 2019 — PMID 31473202.
- US FDA, CAERS adverse-event reports, brand name Nutrafol, via openFDA food event endpoint, counts by reaction, outcome and year, read 2026-09-30.