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OS-01 HAIR | 1 Month Supply Refill

4.2
4.2 out of 5
4.2 (54)
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A breakthrough for thicker, denser, healthier hair.
01 Introducing the first scalp serum powered by OS-01, proven to target cellular senescence, a key contributor of hair loss and thinning.
02,03,06,07,08

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“By preventing senescent cells from releasing pro-aging factors, we can prevent healthy cells from becoming “zombies”–containing the spread of senescence and slowing down skin aging.” 3Science2

Alessandra Zonari, PhD
OneSkin Co-Founder & CSO 3Science2
OneSkin

OS-01 Peptide 3Science2

Our OS-01 formula targets aging at the cellular level, leaving skin nourished and resilient to daily stress 3Science2

Science Driven Innovation 3Science2

Utilizing advanced research to create effective skincare solutions. 3Science2

Inclusivity and Accessibility

Catering to a diverse range of skin types and needs.

Longevity and Sustainability

Focusing on long-term skin health and eco-friendly practices.

the 30-day one skin challenge

Instantly hydrated,deeply nourished skin 3Science2

93% agree their skin feels protected

87% agree skin looks visibly firmer

80% agree their skin appears to regenerate overnight

OUR APPROACH

Results that go beyond the lab 3Science2

7
Years of Research 3Science2

900
Peptides Screened

0
Patents & Publications

9000
Patents & Publications

OneSkin

Behind One Skin Longevity 3Science2

3Science2 As more senescent cells accumulate, your skin experiences accelerated skin aging, including visible signs like wrinkles, loss of elasticity and firmness, crepiness, and thinning.

  1. Possible Increase of Skin’s Epidermal Thickness
  2. Increase of Key Biomarkers Associated with Cell Proliferation and Collagen Production
  3. May promote cell proliferation and collagen production, which can promote firmer, more renewed skin.
  4. Retinol Increases a Key Marker Associated with Skin Aging. OS-01 FACE Does Not.

How to apply OS-01 FACE and add to your routine 3Science2

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  • Dispense 1-2 pumps of OS-01 FACE onto fingers
  • Gently massage into skin on the face, neck, and hands
  • Use 2 times daily

3Science2

How it works 3Science2

Powered by the OS-01 Senescence Peptide™

The only peptide scientifically proven to reverse skin aging at the cellular level 01,02,03 3Science2

Frequently asked questions 3Science2

OS-01 HAIR | 1 Month Supply Refill

4.2
Rated 4.2 out of 5 stars
Based on 54 reviews
Total 5 star reviews: 33 Total 4 star reviews: 6 Total 3 star reviews: 10 Total 2 star reviews: 2 Total 1 star reviews: 3
70%would recommend this product
54 reviews
  • JM
    Jennifer M.
    Verified Buyer
    Reviewing
    OS-01 HAIR | 1 Month Supply Refill
    Rated 3 out of 5 stars
    Yesterday
    Maybe? Maybe not.

    I love using this product. I find the routine to be soothing and enjoyable. However, I haven't seen a positive change in my hair yet.

    OneSkin
    1 minute ago

    Hi Jennifer!

    Thank you so much for this wonderful feedback — we're so happy to hear that you're loving the routine and finding it soothing and enjoyable! That truly means the world to us.

    We completely understand the eagerness to start seeing visible changes, and we want to share some context that we hope will be encouraging!

    OS-01 HAIR works at the cellular level to target senescent cells in the hair follicle — the root cause of hair thinning and loss. Because it's working from the inside out, results build gradually over time. In our 6-month clinical study, participants saw significant improvements in hair density and thickness at both 3 and 6 months — with results continuing to increase between those two timepoints. 81% of participants saw a 40% improvement in hair density, and 78% saw a 43% improvement in strand thickness.

    A couple of things that may help maximize your results:

    • Timeline — early results in our clinical study began appearing at 3 months, with the most significant improvements seen at 6 months. The results are building beneath the surface even when they're not yet visible, so staying consistent is key!
    • Dermaroller — if you're not already using the dermaroller alongside OS-01 HAIR, adding it is the single biggest boost you can make to your routine. It creates micro-channels in the scalp that significantly improve absorption of the OS-01 peptide.
    • Twice daily application — applying OS-01 HAIR twice daily, morning and evening, directly to the scalp and leaving it on without rinsing gives you the best opportunity to see the results from our clinical study.

    We're so excited for you to see the changes ahead — and we love that you're already enjoying the journey! Please don't hesitate to reach out to us at support@oneskin.co if you'd like any personalized guidance.

    Thank you for choosing OneSkin!

  • JW
    Jaime W.
    Verified Buyer
    Reviewing
    OS-01 HAIR | 1 Month Supply Refill
    I do not recommend this product
    Rated 2 out of 5 stars
    2 days ago
    Hair growth

    I haven't seen any new hair growth yet.

    OneSkin
    22 seconds ago

    Thank you so much for this wonderful feedback, Jamie! — we're so happy to hear that you're loving the routine and finding it soothing and enjoyable! That truly means the world to us.

    We completely understand the eagerness to start seeing visible changes, and we want to share some context that we hope will be encouraging!

    OS-01 HAIR works at the cellular level to target senescent cells in the hair follicle — the root cause of hair thinning and loss. Because it's working from the inside out, results build gradually over time. In our 6-month clinical study, participants saw significant improvements in hair density and thickness at both 3 and 6 months — with results continuing to increase between those two timepoints. 81% of participants saw a 40% improvement in hair density, and 78% saw a 43% improvement in strand thickness.

    A couple of things that may help maximize your results:

    • Timeline — early results in our clinical study began appearing at 3 months, with the most significant improvements seen at 6 months. The results are building beneath the surface even when they're not yet visible, so staying consistent is key!
    • Dermaroller — if you're not already using the dermaroller alongside OS-01 HAIR, adding it is the single biggest boost you can make to your routine. It creates micro-channels in the scalp that significantly improve absorption of the OS-01 peptide.
    • Twice daily application — applying OS-01 HAIR twice daily, morning and evening, directly to the scalp and leaving it on without rinsing gives you the best opportunity to see the results from our clinical study.

    We're so excited for you to see the changes ahead — and we love that you're already enjoying the journey! Please don't hesitate to reach out to us at support@oneskin.co if you'd like any personalized guidance.

  • AG
    Ashley G.
    Verified Buyer
    Reviewing
    OS-01 HAIR | 1 Month Supply Refill
    I recommend this product
    Rated 4 out of 5 stars
    1 week ago
    Yes, I think it's worth it...

    I am on my 4th bottle and I do think it helps with shedding and growth. I do like to remind myself that there is no serum that is going to give me different hair - I have very fine hair that is on the thinner side. I definitely see the baby hairs along my hairline around my face the most. I do not use the roller, which maybe I should also invest in.

    IF you have finer thin hair like mine, you might also find that it makes your hair a little greasier than other serums I have tried.

    And lastly, with any hair product -- patience and consistency are the only way to see results. 3- 6 months to see real change.

    OneSkin
    1 week ago

    Hi Ashley! Thank you so much for your wonderful 4-star feedback about OS-01 HAIR! We're absolutely thrilled to hear that you're on your 4th bottle and experiencing positive results - that kind of long-term commitment and success really means the world to all of us at OneSkin!

    We love your realistic perspective about hair transformation and your patience with the process! The fact that you're seeing those encouraging baby hairs along your hairline after consistent use shows exactly how our science-backed approach can support your hair's natural growth cycles, even with fine, thinner hair types.

    Your insights about the texture with finer hair and the importance of 3-6 months for real change are exactly the kind of thoughtful feedback that helps other customers set proper expectations for their own hair journey! We really appreciate you sharing those honest observations about your experience, as it shows the dedication you've put into understanding how OS-01 HAIR works best for your specific hair type.

    The fact that you're considering adding the roller shows how invested you are in maximizing your results - we love seeing that kind of enthusiasm for the complete routine!

    Thank you for taking the time to share such detailed and encouraging feedback about your OS-01 HAIR experience - your 4-star review and continued loyalty truly means so much to us!

  • LC
    Liz C.
    Verified Buyer
    Reviewing
    OS-01 HAIR | 1 Month Supply Refill
    I recommend this product
    Rated 5 out of 5 stars
    1 week ago
    LOVE LOVE LOVE

    LOVE LOVE LOVE

  • HS
    Holly S.
    Verified Buyer
    Reviewing
    OS-01 HAIR | 1 Month Supply Refill
    I recommend this product
    Rated 5 out of 5 stars
    4 weeks ago
    My hair is healthier than ever!

    I'm on my 3rd bottle now and I'm loving how healthy my hair looks and feels! I just recently started using the micro roller too so I'm hoping for even more new growth.

All Ingredients

Water (Aqua), Glycerin, Calycophyllum Spruceanum Bark Oleic Extract (Pau Mulato), Sorbitan Olivate, Cetearyl Olivate, Squalane, Carapa Guianensis Seed (Andiroba) Oil, Vitis Vinifera (Grape) Seed Oil, Pentaclethra Macroloba (Pracaxi) Oil, Rosa Canina (Rose hips) Fruit Oil, Prunus Domestica (Plum) Seed Oil, Caprylhydroxamic Acid, Glyceryl Caprylate, Decapeptide-52*, Hyaluronic Acid, Sodium Hyaluronate, Sodium Hyaluronate Crosspolymer, Niacinamide, Allantoin, Bentonite, Tocopheryl Acetate, Tocopherol, Cellulose, Cetyl Palmitate, Sorbitan Palmitate, Xanthan Gum, Potassium Sorbate, Phenoxyethanol, Sorbic Acid, Caprylyl Glycol, Tetrasodium Glutamate Diacetate. *OS-01 Peptide.

Citations

01 Based on data from clinical studies and/or lab studies conducted on human skin samples, 3D skin models, and skin cells in the OneSkin lab. Explore more at oneskin.co/claims
02 Zonari, A., et al. npj Aging, 2023 03https://www.fda.gov/news-events/press-announcements/fda-advances-new-proposed-regulation-make-sure-sunscreens-are-safe-and-effective 04 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5651070/ 05 https://academic.oup.com/bbb/article/72/12/3211/5941013 06 https://pubmed.ncbi.nlm.nih.gov/32522955/ 07 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8068194/ `https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3583886

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