Beauty starts from within: stress, biology, nutrition and hormonal shifts can all show up in the way hair and skin look. At the Unilever Wellbeing Collective, we develop supplements with unique formulas and complementary products that fit into daily life - so supporting inner wellbeing can translate into visible benefits in real-world routines.
Our Nutrafol research program is grounded in a multi‑mechanism nutraceutical approach and designed around clinician‑relevant endpoints. We prioritize randomized, double‑blind, placebo‑controlled trials that incorporate objective measures such as standardized imaging and phototrichogram‑based hair counts, alongside blinded investigator global assessments and participant‑reported outcomes. This integrated methodology allows us to evaluate both biological changes in hair growth and outcomes that matter in real‑world clinical practice and to your patients.
Through our products at OLLY, we use nutrients that reflect core biology behind healthy hair, skin and nails. Biotin supports keratin production, collagen provides structural amino acids for skin and nail strength, and antioxidants help counter everyday oxidative stress that can visibley affect the skin’s appearance. Additional components - such as keratin, amla, hyaluronic acid and sea buckthorn - seek to address the broader mechanisms involved in maintaining protein integrity, micronutrient balance, hydration, and barrier lipids. Together, these science-informed inputs connect inner nourishment with outward resilience in ways that are simple to sustain in daily routines. Brands such as Nutrafol and OLLY help people connect inner wellbeing to visible outcomes with products that are easy to integrate alongside routine care.
To learn more about the science behind beauty from within, visit the Science & Research section. Highlights include:
Yes. Nutrafol and OLLY’s dietary supplement products are regulated by the FDA under the Dietary Supplement Health and Education Act (DSHEA) and monitored by the FTC. Learn more on our Regulation in Practice page.
Nutrafol’s efficacy is supported by multiple peer‑reviewed clinical studies, including randomized, double‑blind, placebo‑controlled trials and longer‑term extension studies. Across diverse populations - women and men with thinning hair, peri‑ and postmenopausal women, and individuals of varied ethnic backgrounds - Nutrafol has demonstrated significant improvements in terminal and total hair counts, investigator‑rated hair growth and quality, and reductions in shedding versus placebo. Benefits were observed as early as three (3) months after daily use and continue with sustained use, with a favorable safety and tolerability profile.
OLLY ingredients and formulations are supported by a strong body of ingredient-level evidence related to hair, skin, and nail health. For example, collagen peptides have been shown to support skin structure, hydration and hair thickness in clinical and mechanistic studies. Antioxidant-rich botanicals - including those studied in dermatology and inflammation research - can help counter oxidative stress, a known contributor to changes in skin and hair quality.
Yes. Nutrafol’s formulas are designed to align with consumers’ physiological needs - including products specifically formulated for men and women, men aged 50+, postpartum women, and during a woman’s menopausal transition.
Nutrafol’s clinical trials evaluate a combination of objective, investigator‑assessed, and participant‑reported endpoints. Outcome measures commonly include phototrichogram‑based hair counts (terminal, vellus, and total hairs), standardized global scalp photography and blinded investigator global assessments of hair growth and quality (eg, density, coverage, thickness, and shedding). Participant‑reported outcomes assessing perceived hair growth, shedding, appearance, and quality of life are also frequently employed. This multimodal endpoint strategy is designed to capture both biological changes and clinically meaningful outcomes relevant to patient care.
In Nutrafol’s clinical trials, measurable changes can be observed as early as three (3) months of daily use, with continued and progressive improvement at six (6) months and beyond.
It's important to remember that healthy hair growth takes time - and of course, consistency is key. Clients taking Nutrafol daily may experience the following:
1-3 months
· Less shedding and breakage
· Visibly shinier hair
· Lowered stress levels
4 – 6 Months
· Visible improvements in hair thickness and fullness
· Visibly thicker, stronger hair with faster growth
6+ Months
· Experience visible changes in scalp coverage and continued growth
Safety and tolerability are assessed in Nutrafol’s clinical studies, using adverse-event monitoring, participant-reported tolerability, and clinical measures such as vitals or labs when collected. There is also a safety assessment before the studies take place, to confirm safety for clinical trials.
This information is provided as a medical and scientific educational resource for the use of dieticians and other licensed healthcare professionals. This information is intended for Practitioners to use as the basis for determining whether to recommend these products to their clients. All recommendations regarding protocols, dosing, prescribing and/or use instructions should be tailored to the individual needs of the client considering their medical history and concomitant therapies. This Information is not intended for use by consumers.
© 2025 Unilever.
All rights reserved
