OS-01 HAIR SCALP SERUM – OneSkin

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OS-01 HAIR SCALP SERUM

4.4

4.4 out of 5

4.4(250 reviews)(250)

OS-01 HAIR SCALP SERUM

Topical Supplement

4.4

4.4 out of 5

4.4(250 reviews)(250)

IS OS-01 HAIR RIGHT FOR YOU?

The first daily scalp serum powered by the OS-01 PeptideTM to help support fuller, thicker-looking hair through aging and stress conditions.

Disclaimer: Dermaroller is for cosmetic use only. Not intended to diagnose, treat, cure, or prevent any disease.

1-month supply

SAVE 10% EVERY ORDER

-62.00 $69.00

$62.00

1 month supply delivered every 1 month.

3-month supply

SAVE 20% EVERY ORDER

176.00$217.00$176.00

3 month supply delivered every 3 months.

include dermaroller?

Yes +$176.00

FREE OneSkin Travel Bag + dermaroller

$59FREE

6-month supply

SAVE 25% EVERY ORDER

321.00 $424.00

$321.00

6 month supply delivered every 6 months.

include dermaroller?

Yes +$321.00

FREE OneSkin Travel Bag + 2 dermarollers

$79FREE

SUBSCRIPTION EXCLUSIVES

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Quantity

1-month supply / Without dermaroller

3-month supply / With dermaroller

6-month supply / With dermaroller

ADD TO CART - $217$176

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OS-01 HAIR SCALP SERUM3-month supply

ADD TO CART - $217$176

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Try it risk-free for 30 days!

You’re earning 62 points with OneSkin Loyalty Program

Buy it once*

*We recommend 3-6 months of consistent use to see results

Need a dermaroller?

Clean + Safe Ingredients

Our products are non-comedogenic (non-pore clogging), 100% free from fragrance, parabens, sulfates, lanolin, MCI/MI, DEA, heavy metals, talc, petrolatum/paraffin/mineral oil, gluten, phthalates, PFAs and do not contain unnecessary emulsifiers, preservatives, and solvents.

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BENEFITS

Daily scalp serum designed to nourish the scalp and support visibly healthier and younger-looking hair.

Promote hair longevity

Addresses visible hair changes associated with age and stress.

Hair health starts at the scalp

Suitable for sensitive skin and supports a healthy scalp microbiome to support healthy hair.

Support thicker, denser, fuller-looking hair

Key ingredients complement the OS-01 Peptide to promote strong, healthy-looking hair for progressive improvements in visible density and thickness.

CLINICAL DATA

Visible results, scientifically validated

81 of participants showed an increase in visible hair density (average +40%) after 6 months 01

78 of participants showed an increase in hair visible thickness (average +43%) after 6 months01

81 of participants observed overall improvements in their hair after 3 months 01

78 of participants said the overall health of their hair improved after 6 months 01

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5-STAR REVIEWS

See why customers love OS-01 HAIR

"Just fantastic growth in areas where I desperately needed it." — LaDonna L., Beta Tester

"It worked so well! No irritation and dried without leaving a residue." — Jodi F., Beta Tester

"This is a real solution. Others promise. This delivers. I can only imaging what I'd have to pay to have this in my daily routine—and yes, I will pay it. After a certain age, you pay what you must—not to look younger, but to look your best." — Queen E., Beta Tester

The proof is in the pictures

What makes OS-01 HAIR unique?

6 active ingredients complement the OS-01 peptide

see all ingredients

Panax Ginseng Root extract

Helps support a refreshed, revitalized-looking scalp and improve the overall look and feel of the scalp.

Fisetin

A naturally occurring antioxidant that helps defend against environmental stressors and supports a healthy-looking scalp environment for healthier-looking hair.

Oryza Sativa (rice) bran water

A nutrient- and antioxidant-rich extract that helps strengthen and smooth hair while enhancing shine and manageability, and supporting a balanced scalp environment.

Sunflower Sprout extract

Rich in antioxidants and nutrients such as vitamins A, D, and E to help protect the hair and scalp from environmental stressors, and maintain the look of healthy, vibrant hair.

Biotin

Helps strengthen hair to reduce breakage, supporting visibly fuller, thicker-looking hair.

Inulin and Alpha-Glucan Oligosaccharide

Prebiotic ingredients that support a balanced, healthy-looking scalp and help improve hydration, promoting moisture retention and reducing dryness.

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How to Apply OS-01 HAIR

  1. We recommend applying one full pipette (2 squeezes) to the entire scalp during each application.
  2. Fill the glass pipette by squeezing the applicator bulb, one squeeze will give you half the application dose.  Apply the serum directly to your scalp, starting at your natural part or hairline.
  3. Refill the glass pipette again, with a second squeeze, and continue applying to areas of concern to complete the full dose.
  4. Massage the serum into your scalp with your fingertips to ensure even distribution.
  5. Do not rinse. Style as usual.
  6. Use daily on dry or damp hair.

A 50 mL bottle of OS-01 HAIR should last approximately 30 days with regular use.

Your OS-01 HAIR questions answered

Can I use this serum alongside minoxidil or other hair treatments and products?

OS-01 HAIR complements other medical-grade treatments and can be used alongside other products as well. We always recommend applying OS-01 HAIR first and patch-testing when using other products to ensure the combination of all products works well for you.

If you are currently using a product containing Minoxidil please DO NOT completely stop use of that product or treatment. We recommend using OS-01 HAIR in combination with the product containing Minoxidil. You can start using OS-01 HAIR immediately, but do not stop Minoxidil abruptly. If you plan to discontinue Minoxidil, we recommend tapering off gradually over a few weeks or months to minimize excessive shedding. Please contact your physician for individual recommendations on how to safely discontinue the use of Minoxidil.

Can I use this serum if I have sensitive skin or a sensitive scalp?

Absolutely! OS-01 HAIR was formulated to be safe for sensitive skin and scalps.

Is this serum suitable for all hair types?

Definitely! OS-01 HAIR is suitable for all hair types, including oily hair, and integrates easily into any hair care routine with visible results within as little as 90 days.

Is this safe for use during pregnancy or breastfeeding?

All OneSkin products are free of sulfates, parabens, and phthalates. Additionally, we post the full ingredient list of each product on the description pages. We recommend consulting with your doctor if you have any concerns about starting new products while pregnant or breastfeeding, as they know your particular needs best! As always, we recommend pregnant and breastfeeding women consult their physician with any questions or concerns.

Do I apply this before washing my hair or can I leave it on?

OS-01 HAIR should be left on and not rinsed. Apply 1mL of OS-01 HAIR serum 1-2x daily (AM or PM) directly to your scalp and massage in with your fingertips. Leave on, and do not rinse. For enhanced absorption, use a dermaroller on a clean scalp before application.

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#before-afters

HOW IT WORKS

Powered by the OS-01 Senescence Blocking Peptide™

Born from over a decade of longevity science, OS-01 is engineered to address a key driver of visible skin, scalp, and hair aging, for skin and hair that looks and feels younger and healthier over time.02

DISCOVER THE SCIENCE

All 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.

OS-01 HAIR SCALP SERUM

4.4

Rated 4.4 out of 5 stars

Based on 250 reviews

5 Rated out of 5 stars

168

Total 5 star reviews: 168

4 Rated out of 5 stars

45

Total 4 star reviews: 45

3 Rated out of 5 stars

22

Total 3 star reviews: 22

2 Rated out of 5 stars

6

Total 2 star reviews: 6

1 Rated out of 5 stars

9

Total 1 star reviews: 9

85% would recommend these products

Reviews 250(tab expanded) Questions 85(tab collapsed)

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250 reviews

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Taylor E.

Verified Buyer

Reviewing

OS-01 HAIR SCALP SERUM

I recommend this product

Rated 5 out of 5 stars

2 days ago

Excited to see results

I’ve only been using for a couple weeks but the serum is easy to apply and massages in well. I don’t think I’ve seen results yet, but this product is giving me hope after I noticed postpartum hair loss. At the very least I feel like I’m nourishing my hair and scalp.

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Margarette L.

Verified Buyer

Reviewing

OS-01 HAIR SCALP SERUM

I recommend this product

Rated 5 out of 5 stars

3 days ago

Dermaroller and Scalp Serum are a perfect combination

I have been using one Skin scalp serum with the DermaRoller for 3 weeks and already noticed a difference. I also enjoy the soothing massage.

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Me W.

Verified Reviewer

Reviewing

OS-01 HAIR SCALP SERUM

I do not recommend this product

Rated 1 out of 5 stars

1 week ago

What about the unsafe ingredients

What about phenoxyethanol? Why would a banned ingredient be banned in other countries but not the USA? Please clarify this or I’m sending it back

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OneSkin

1 week ago

Hi!

We love that you're paying close attention to what's in your skincare! Ingredient and formulation transparency is incredibly important to us, so let's walk through this together.

First, some good news: phenoxyethanol is not banned in the United States, the European Union, or Japan. What differs between regions is how each one regulates it, not whether it's considered safe. In the EU and Japan, phenoxyethanol is legally capped at concentrations of 1% or less in cosmetic products. In the U.S., the FDA has reviewed phenoxyethanol and considers it safe for cosmetic use at that same general range, relying on an ongoing expert safety review process rather than a fixed legal percentage. So while the regulatory approach differs by country, the safety conclusion lines up everywhere: this ingredient is considered safe at low concentrations.

We also wanted to note that phenoxyethanol is not an ingredient in the formula for OS-01 HAIR!

For our other products, phenoxyethanol wasn't a default choice for us — it was a deliberate one, backed by our own testing. We included phenoxyethanol to ensure the stability of our formula, at a concentration significantly below the 1% safety cutoff recognized internationally. We chose it specifically because we ran extensive safety testing to confirm it would be gentle enough for sensitive skin while effectively preventing microbial growth within the formula — which matters just as much for your safety as the ingredients we leave out. OS-01 FACE is already formulated without fragrance, parabens, sulfates, lanolin, MCI/MI, DEA, heavy metals, talc, petrolatum, phthalates, and PFAs, and phenoxyethanol was selected as one of the most thoroughly studied, well-tolerated preservative options available today, used at a concentration well within the range experts consider safe.

We know how much thought goes into choosing what you put on your skin, and we're genuinely glad you asked rather than just wondering. Our goal is for you to feel fully confident — not just comfortable, but excited — about every ingredient in your routine.

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Alison P.

Verified Buyer

Reviewing

OS-01 HAIR SCALP SERUM

I recommend this product

Rated 5 out of 5 stars

2 weeks ago

New hair growth

Definitely seen some new baby hair growth in the treated area! Been using for 3+ months now and am gonna keep religiously using it till end of my bottles!

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Yes, this review from Alison P. was helpful. 0 people voted yesNo, this review from Alison P. was not helpful. 0 people voted no

Kathryn

Reviewing

OS-01 HAIR

I recommend this product

Rated 4 out of 5 stars

3 weeks ago

4 Stars

So car so good. I dimt yhink ive been using it long enough to reach full benefit. I will keep using ti see if my hair starts to come in thicker.

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Yes, this review from Kathryn was helpful. 0 people voted yesNo, this review from Kathryn was not helpful. 0 people voted no

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