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Prove it.

Many supplements are never clinically tested for efficacy. Are you ok with that? Neither are we.

The gold standard of clinical testing.

A 6-month, randomized, double-blind, placebo-controlled study.

80% circle graph

Saw improved
hair growth.

80% circle graph

Saw improved
hair thickness.

73% circle graph

Saw improved
hair growth rate.

Our objective:

To test the efficacy of the daily supplementation of 4 Nutrafol Core for Women capsules to promote hair growth in women with self-perceived thinning hair.


We enrolled 40 qualified women ages 21-65 who perceived themselves as having thinning hair.

Randomized and placebo-controlled.

Participants were randomly divided into two groups. The first group was given 4 capsules of Nutrafol daily. The second group, designated as the control group, was given 4 placebo capsules.


In order to avoid influencing users’ perception during the trial, neither group was told which type of capsules they were receiving or what supplement was being tested. This information was also withheld from the evaluators.


Throughout the 6-month trial, there were three progress check-ins (Day 1, Day 90, and Day 180) in which participants underwent a scalp examination, a global hair assessment, and completed a questionnaire.


Scalp examination - Day 180 (6 months)

Evaluators counted vellus hairs (baby hairs) and terminal hairs (longer, thicker hairs) on a 2 cm area of the scalp.

figure 1. vellus hair count

Nutrafol users showed a 16.2% improvement in vellus hairs while placebo users showed a -2.3% change.

figure 2. terminal hair count

Nutrafol users showed a 10.3% improvement in terminal hairs while placebo users showed a 3.5% improvement.

Global Hair Assessment - Day 180 (6 months)

Evaluators examined hair quality: scalp coverage, dryness, brittleness, shine, texture, and overall appearance.

figure 3. global improvement in hair growth & quality

Nutrafol users saw a 13.5 fold improvement in hair growth and quality compared to the control group taking the placebo.

figure 4. images of subjects at baseline and day 180

Self Assessment - Day 180 (6 months)

Each participant submitted a self-assessment questionnaire to report perceived changes in their hair growth, mind/body wellness, as well as how the supplement fit their routine and lifestyle preferences.

figure 5. self-assessment questionnaire

Nutrafol users reported major improvements in hair growth and quality. Users also saw significant improvements in areas of wellness and quality of life including stress, anxiety, overall wellbeing, and skin health. No adverse effects were reported by any of the users.

The study was performed by renowned board-certified dermatologist Dr. Glynis Ablon, MD at the Skin Institute Research Center in Manhattan Beach, California.

Want to read the full published study? You’re our kind of researcher.

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These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.
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