Nutrafol Expands Comprehensive Hair Health Approach With the Launch of Its Newest Haircare Innovation: Strand Serum

Nutrafol, the #1 dermatologist-recommended hair growth supplement brand*, today announced the launch of Strand Serum, the brand’s first clinically tested, physician-formulated serum dedicated to strand health. Strand Serum further expands Nutrafol’s science-backed approach beyond the biological root causes of hair thinning to address one of the most common concerns among people experiencing thinning: hair breakage. Clinical testing found Strand Serum’s DualFusion™ Complex delivers 6X1 stronger hair and reduces breakage by up to 83% over time addressing the feeling that hair won’t grow, when the real issue is breakage undermining growth before it’s visible. Nutrafol Strand Serum is NSF Certified for Sport®, extending the company’s rigorous third-party testing standards to topical haircare alongside its commitment to innovation and efficacy.

Strand Serum expands Nutrafol’s comprehensive approach to hair health to address the full journey from growth to length: Nutrafol Hair Growth Nutraceuticals provide support from within, scalp products support the environment where hair grows, and Strand Serum targets the strand itself – strengthening from cortex to cuticle to help protect against breakage and protect visible length.

The Missing Step Between Growth and Length: The Overlooked Role of Breakage

Since pioneering the category more than a decade ago, Nutrafol has helped redefine the conversation around hair health by focusing on the underlying factors that influence healthy hair growth, including stress, hormones, lifestyle, metabolism, nutrition and aging. That whole-body approach has helped millions of consumers understand that healthy hair starts long before it emerges from the scalp. But growing healthy hair is only part of the equation. For people experiencing thinning, already vulnerable strands can be especially susceptible to breakage, making hair appear thinner and shorter over time. Strand Serum was developed to address this missing step: helping protect the healthy hair people have already grown so it can reach visible length.

Advancing Strand Health, Addressing Breakage From The Cortex to the Cuticle

The science behind Strand Serum starts with porosity – hair’s ability to absorb and retain moisture – an often-overlooked driver of breakage. High-porosity hair has a lifted, damaged cuticle that leaves strands more vulnerable to breakage, frizz, dryness, and split ends. Rather than addressing breakage as an isolated concern, Strand Serum supports hair’s porosity by sealing damaged, porous areas along the strand for smoother hair. This can lead to strengthened hair fibers, improving resilience to breakage to protect visible length.

The clinically tested, physician-formulated serum is designed to:

• Reduce breakage by 83% over time2
• Deliver 6X stronger hair1
• Reduce split ends by 62%
• Achieve 85% frizz reduction for up to 72 hours
• Improve hair porosity and support stronger, visibly healthier strands
• Protect hair from heat damage up to 450°F

“At Nutrafol, we’ve never developed products around trends; we develop them around unmet consumer needs and evolving science,” said Kim Biedermann, PhD, Chief R&D Officer at Nutrafol. “For more than a decade, we’ve advanced our understanding of the biology behind hair thinning and healthy growth. That work also revealed an important part of the hair journey that was being overlooked: protecting the healthy hair you’ve already grown. Strand Serum’s DualFusion™ Complex is the natural extension of that work, expanding our product offerings beyond the follicle to strengthen vulnerable strands from the cortex to the cuticle to address breakage.”

How DualFusion™ Complex Technology Works

Powered by Nutrafol’s DualFusion™ Complex, Strand Serum works to support the strand from cortex to cuticle, unlike traditional serums that primarily coat the surface of the hair or work from the inside alone. A strengthening water phase penetrates the hair cortex while a nourishing oil phase seals the cuticle, reinforcing strands from within while protecting them from external daily breakage, supporting stronger, healthier-looking that can grow longer over time.

“One of the things I see often in practice is that breakage becomes even more noticeable when someone is already experiencing hair thinning,” said Dr. Heather Woolery-Lloyd, board-certified dermatologist and Chief Medical Advisor at Nutrafol. “Patients may be growing healthy hair, but if those strands are weakened by heat styling, chemical processing or everyday wear, they’re more likely to break before reaching their full potential. Strand Serum was developed to strengthen vulnerable hair fibers from the outside in, and help people protect the healthy growth they’re already working to achieve.”

Strand Serum is powered by the following ingredients:

• Milk Thistle Seed Extract to help strengthen the hair cortex
• Wild Olive Extract derived from stem cells and helps hair feel soft and moisturized, while visibly sealing split ends
• Hemisqualane, a sugarcane-derived silicone alternative, replenishes protective lipids and helps defend against breakage
• Rosehip Fruit Extract, derived from the fruit of roses grown in Spain and full of vitamins, antioxidants and fatty acids

Strand Serum was developed with the same scientific rigor Nutrafol has brought to hair health since inception, evaluating 36 ingredient candidates across 54 formula iterations and 18 preclinical studies before assessing the final formula for efficacy and safety. This vegan formula is color-safe, extension-safe, and formulated without parabens, phthalates, silicones, sulfates, or synthetic fragrance. Consumer testing included the full range of hair types (1A–4C), including chemically treated, color-treated and chemically straightened hair.

Beginning today, Nutrafol subscribers can shop Strand Serum exclusively through the myNutrafol app ahead of its broader launch on October 6. Strand Serum will then be available on Nutrafol.com, through Nutrafol’s expansive network of haircare and healthcare professionals, and on Amazon for $54 (30 mL/90-day supply). A 30 mL Strand Serum + Brush Kit will be available for $54 exclusively at Ulta Beauty Oct. 11. To learn more about Strand Serum and Nutrafol’s physician-formulated hair health portfolio, visit Nutrafol.com and follow @Nutrafol on Instagram and TikTok.