HAIR SCALP SERUM
HAIR SCALP SERUM
Lightweight serum to reduce visible shedding + boost density.
Age-Reversal Peptide ⦁ Thickening ⦁ Color Safe ⦁ Non Greasy
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Details
Details
- Our proprietary OS-01 Senescence-Blocking Peptide™ reverses the visible effects of cellular senescence (dysfunction) at the hair follicle, where age-related thinning begins
- Supports a healthy hair cycle for less visible shedding, and thicker, fuller hair over time¹
- Clinically validated to increase hair density by +40% and thickness by +43%¹
- Lightweight, fragrance-free, and dermatologist-tested formula dries residue-free
Clinical proof
Clinical proof
- +40% increase in hair density, shown in 81% of users, after 6 months¹
- +43% increase in hair thickness, shown in 78% of users, after 6 months¹
- 75% observed visible new hair after 3 months¹
- 72% reported less visible shedding after 6 months¹
Ingredients
Ingredients
Formulated without
Our products are formulated without fragrance, parabens, sulfates, lanolin, MCI/MI, DEA, heavy metals, talc, petrolatum/paraffin/mineral oil, gluten, phthalates, and PFAs. We also avoid unnecessary emulsifiers, preservatives, and solvents.
Ingredients
Water, Glycerin, 1,2-Hexanediol, Butylene Glycol, Hydroxyacetophenone, Panthenol, Inulin, Helianthus Annuus (Sunflower) Sprout Extract, Cellulose Gum, Alpha-Glucan Oligosaccharide, Tetrasodium Glutamate Diacetate, Propanediol, Morus Nigra Leaf Extract, Arginine, Acetyl Tyrosine, Rehmannia Chinensis Root Extract, Pentylene Glycol, Sodium PCA, Erythritol, Chondrus Crispus, PEG-12 Dimethicone, Oryza Sativa (Rice) Bran Water, Decapeptide-52*, Calcium Pantothenate, Zinc Gluconate, Sodium Benzoate, Niacinamide, Ornithine HCl, Caprylyl Glycol, Polyquaternium-11, Citrulline, Hydrolyzed Soy Protein, Xanthan Gum, Glucosamine HCl, Disodium Succinate, Fisetin, Raspberry Ketone, Sodium Benzoate, Citric Acid, Potassium Sorbate, Arctium Majus Root Extract, Panax Ginseng Root Extract, Biotin.
*OS-01 Peptide
How to use
How to use
Fill the glass pipette with serum by squeezing the applicator bulb (the pipette will be about half full). Apply the serum directly to your scalp and massage in to ensure even distribution. We recommend applying two pipettes’ worth (2 squeezes) to the entire scalp during each application. Do not rinse, and style as usual. Use 2x daily on dry or damp hair.
A 50 mL bottle of OS-01 HAIR SCALP SERUM should last approximately 30 days with regular use.
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Certified plastic neutral in partnership with RePurpose
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Certified cruelty-free by The Leaping Bunny
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Approved by the National Eczema Association
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Clinically tested to support the skin microbiome
The Only Scalp Serum To Target A Key Root Cause Of Age-Related Hair Thinning With The Os-01 Peptide™.
- Powered by the OS-01 Peptide™
Proven to reverse the visible effects of follicle-cell senescence, supporting hair density and reduced visible shedding. - Improves density
Results build with consistent use, including denser, thicker hair after 6 months.1 - Reduces visible shedding
Supports a healthy hair cycle at the root, resulting in less visible shedding after 6 months.¹ - Lightweight, water-based texture
Fast-absorbing formula dries residue-free and never feels greasy.
Clinically Validated Results That Build Over Time
Visible Results For Fuller, Healthier-Looking Hair
Powered by OS-01 Peptide™, this lightweight scalp serum targets the follicle to support healthier-looking hair over time. With consistent use, hair can appear fuller, stronger, and visibly improved while the scalp feels more balanced and nourished.
Clinically Validated Improvements In Just 3 Months
75%
observed the appearance of new hair after 3 months
75%
said their hair appears visibly fuller after 3 months
81%
observed overall improvements in their hair after 3 months
Key Ingredients
OS-01 Peptide™
OS-01 Peptide™
Proven to reverse the visible effects of follicle-cell senescence.
Panax ginseng
Panax ginseng
Supports natural circulation to deliver nutrients to follicles.
Rice bran water + sunflower sprout
Rice bran water + sunflower sprout
A duo of rice bran and sunflower sprout rich in ferulic acid to visibly strengthen and protect hair.
Biotin + fisetin
Biotin + fisetin
Helps protect follicles from the visible effects of oxidative stress and visibly strengthen the hair shaft for healthier and stronger-looking hair over time.
Prebiotic complex
Prebiotic complex
A prebiotic duo that supports a balanced scalp microbiome—a key marker of scalp and hair health.
Customer Reviews
FAQs & Answers
How Do I Use OS-01 HAIR SCALP SERUM?
How Do I Use OS-01 HAIR SCALP SERUM?
Apply the serum directly to the scalp and massage it in evenly with your fingertips. Leave it on—there’s no need to rinse. OneSkin recommends using it 1–2 times daily.
Is It Suitable For All Hair Types?
Is It Suitable For All Hair Types?
Yes. OS-01 HAIR is designed for all hair types, including oily hair, and can be incorporated into most daily hair care routines.
How Long Does It Take To See Results?
How Long Does It Take To See Results?
Some users reported visible improvements after about 3 months, while clinical results for density, thickness, and shedding continued to improve through 6 months of consistent use.
What Does OS-01 HAIR Help With?
What Does OS-01 HAIR Help With?
It is designed to support healthier-looking hair by improving the appearance of density and thickness while helping reduce visible shedding and support a healthy hair cycle.
Will It Make My Hair Feel Greasy?
Will It Make My Hair Feel Greasy?
The serum is formulated with a lightweight texture and is designed to integrate easily into your regular styling routine. In consumer testing, 85% of users described the product as lightweight.
Should I Use A Dermaroller With The Serum?
Should I Use A Dermaroller With The Serum?
A dermaroller is not required for everyday use, but OneSkin notes that using one on a clean scalp before application may help enhance absorption. The brand’s 6-month clinical study also evaluated the serum alongside daily dermarolling.