We literally count hairs.
We leverage a combination of industry-leading hair measurement tools—from hair counts to pull tests—to assess growth, quality, shedding, and texture. Because our results aren't just visible—they're measurable.
We publish our results.
Our research is published in scientific journals, and therefore undergoes thorough evaluation by scientific experts to ensure the clinical rigor, quality, and reliability of the results.
We are never done researching.
We’ve conducted 20 clinical studies (and counting). And we continue our research so that we evolve with the science and keep delivering meaningful results.
Dive deeper into our award-winning Hair Growth Nutraceuticals.
Most supplements aren't clinically tested, but we're raising the bar for ourselves (and you). That's why we measure results in real people, including in randomized placebo-controlled trials.
Nutrafol Women
For Women 18-44
Nutrafol Women's Balahce
For Womeh 45+
Nutrafol Men
For Men 18-49
Shampoo
Cleanses without stripping the scalp to visibly improve hair volume,strength, and texture.1
Conditioner
Multi-layer damage defense to replenish moisture for smoother,stronger hair.1
Shampoo and Conditioner Set
Cleanse and defend for stronger, more voluminous hair.
We had experts count the hairs.
We had experts assess the results.
We documented their progress.
""It not only helped with the thickness and fullness of my hair, but also the strength and durability. People compliment me left and right about how healthy and strong my hair looks.""
"“My halr had been highly damaged from so much stress.It had broken off so much, that my loved ones were worrled. Because of Nutrafol, my halr Is better than ever. No more breakage. It's shiny,bouncy,andsoft to touch.”"
"“Bleaching my hair and adding highlightsseriously damaged my halr over the years. I wasbecoming really insecure about the thinningand noticeable breakage that my hair had.Nutrafol has completely changed my hair.""
""My results were fast and life changing. I nolonger had to be ashamed of my thinning hairbecause once I started taking it, my hairbecame thick, strong, and voluminous!""
Benefits you can see and feel.
Formula benefits
- Visibly thicker volumet
- Visibly less shedding'
- Hair that grows faster,stronger,and longer2
1. Stephens TJ et al. JCAD. 2022./Nutrafol. Data on file. 2020. 2. Ablon G et al. J Drugs Dermatol. 2018., and Stephens TJ et al. JCAD. 2022./Nutrafol. Data on file. 2020.
Women also reported
- Visibly thicker lashes and brows
- Reduced feelings of stress and supported sleep quality
Stephens TJ et al. JCAD. 2022./Nutrafol. Data on file. 2020.
About Nutrafol Women.
Our physician-formulated hair growth supplement is designed for women 18-44 experiencing hair thinning. We use clinically tested ingredients to target root causes of thinning, such as stress, lifestyle, and nutrition.
How we measure our results.
When it comes to hair, we bring precision to perception. We use a combination of standardized and validated measurements—because there's no single measurement for hair health.
How We Measure
A close-Up photo of a small area of the scalp, Usually
using 20x-50x magnification. Phototrichogram ahalysis
allows Us to study hair cycle physiology and
measurement of various hair parameters directly on
people.It is the best non-invasive and reproducible
methodtoquantifhaidensityandhirgrwth
parameters.
A physician's or dermatologist's clinical evaluation of
subjects' hair growth and quality compared over time.
Assessments are often done in person or based on
standardized global photographs using a 7-point scale to
measure the overall improvement for hair growth and hair
quality.
When a subject refrains from shampooing for 5 days,and
then their hair is shampooed and rinsed in a basin with
the drain covered by gauze.The hairs remaining in the
water and thegauze are collected and counted to
determine the number of hairs shed while being washed.
Scientifically validated surveys filled out by people who
participate in clinical research that measure
improvements in hair, as well as quality of life. These
questionnaires have been tested to ehsure they produce
reliable and accurate results.
Stahdardized head shots taken a short distahce away
from the subject to capture the entire head from different
angles. Global photographic assessment can help
determine overall clinical changes in subjects over time in
a stahdardized mahher.
When a dermatologist or investigator grasps 20-60 hairs
and pulls firmly,but gently. lf more than 10% of hairs are
pulled out of the scalp,this means the pull test is positive
and implies active hair shedding.A hair pull test is done
tocheckforactivehairshedding,brittleness,andfragility
When a trained expert and/or dermatologist evaluates
changes in hair growth and quality compared to the start
of the study-including coverage,volume,length,and
strength-using a humerical scale.This assessment is
performed in-persoh.
Questionhalres designed to capture perceived changes
by the subject. Subjects answer detailed questions on
changes they see while using a hew product, including
hvo
asothehealhadwellbeingchangesofinterest
Trusted by Doctors.
“Nutrafol is a necessary part of my hair growth protocol since I have personally seen the positive impact it can have on the hair health of my clients.”
“I've been consistently impressed with Nutrafol's Hair Growth Nutraceuticals. I've seen a noticeable improvement in my patients' hair thickness and overall scalp health after three to six months of consistent use.”
“As a physician, it is important that I rely on science when making recommendations for my patients. The clinical studies are clear; it works. My patients have experienced overwhelming satisfaction with Nutrafol, noting significant improvements in visible hair thickness and growth.”
Experts compensated for their opinion and experience.
We're serious about facts. Ask away.
A clinical study, clinical trial, or clinical research study is an investigation conducted to evaluate the safety, efficacy, and/or product-related adverse reactions of a product, therapy, device, or diagnostic test. Nutrafol conducts clinical studies to show the effectiveness of our final product formulations, something that is not required in the dietary supplement industry. As experts in hair biology and key root causes that affect hair health, Nutrafol shares our clinical study results with the scientific community through peer-reviewed publications and presents our findings at prominent dermatological and medical conferences.
Nutrafol’s rigorous clinical testing includes various types of clinical studies, each of which is utilized for a specific scientific purpose. Our studies are designed with clinical and scientific experts, according to accepted research standards and the most up-to-date techniques available.
A publication refers to an article or research paper that has been written and submitted for public dissemination, typically in a scientific or academic context. Publications are important because they allow researchers to share their findings with the broader scientific community, contributing to the advancement of knowledge, research, and expertise in their field. Peer review is a critical process that ensures the quality and reliability of publications.
Peer review involves the evaluation of the article by experts (peers) in the same field as the author(s) of the paper. These experts assess the validity, significance, and originality of the research before it can be published. It verifies the credibility and accuracy of the study's design, findings, and final interpretation before they are shared with the scientific community and the public.
Peer-reviewed publications are considered more credible and reputable, as compared to non-peer-reviewed papers, because their content has been vetted by experts. This helps readers and researchers trust the validity and reliability of the information presented.
Statistically significant means that the results of a study have been analyzed by appropriate statistical tests and indicate that the outcome was unlikely to have occurred just by chance. This is crucial in scientific research because it helps determine whether findings are reliable, versus a random occurrence.
Randomized, placebo-controlled refers to elements of a study design used in scientific research, especially in clinical trials evaluating the effectiveness of products or interventions. It is considered a gold standard in clinical research for evaluating the efficacy of new products or ingredients because it helps control for various biases and confounding/variable factors.
When a study is randomized, participants are randomly assigned to different groups. This randomness helps to minimize bias and ensures that the subjects aren't purposely assigned to a group that may change the outcome.
In a placebo-controlled study, one group of participants receives the product or ingredient being tested (the active group), while another group receives a placebo—a dummy product that looks like the real product but has no formula ingredients or therapeutic effect (the control group). This allows researchers to compare the effects of the actual product against those of the placebo.
A double-blind study is one in which neither the participants nor the investigators know who is receiving the test product and who is receiving an alternative product, often times the placebo.
Together, all these elements of study design—including double-blinding, randomization, and placebo-controlled—provide highly credible evidence by reducing bias and providing the most rigorous method to examine the efficacy of a product.
The FDA does not expressly require clinical studies for supplements, but the FDA and the FTC do require substantiation for claims used in marketing. Some brands use clinical studies to satisfy this requirement, but most supplements use ingredient studies conducted by third-party suppliers and/or perception studies in lieu of clinical studies on their finished products.
At Nutrafol, we continuously clinically test our products to ensure they deliver real results.
Learn more about our Science.
