A peptide-based moisturizer designed to address cellular aging by targeting senescent cells through the proprietary OS-01 peptide, along with nourishing ingredients like ceramides.
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
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Guru Score
The Guru Score: every expert's verdict on a product, in one simple number.
Under the score you'll see how many experts weighed in, or "Early verdict" while only a few have. Paid takes count for half in the score.
Guru Certified means at least 6 experts, a score of 85% or more, and almost no Nays.
How we score →Mixed
12 experts · Strong agreementWhat the gurus are saying
The OS-01 peptide earns strong praise for its science-backed approach to cellular aging, with multiple experts highlighting how it targets senescent (aging and damaged) cells to clear the way for healthier skin function and collagen production. Most gurus who reviewed it found visible improvements in skin quality, firmness, and elasticity over weeks of use. However, the price point draws scrutiny from some, one expert called it a hundred-dollar niacinamide product without enough differentiation from drugstore alternatives, and others note you'll want to patch-test first and may need to use it as a layered serum rather than a standalone moisturizer to see the benefit.
What they liked
What they flagged
Every take we've logged from this product's reviews across YouTube. Click any row to watch the moment they said it.
Independent of what the gurus think, this is what the published research supports about the main active ingredients here.
Niacinamide has evidence behind it for redness, uneven tone and supporting the skin barrier, and it is usually well tolerated even by skin that reacts to most things.
Source: DermNet
Ingredients like these draw water into the surface layers and slow how fast it leaves. The evidence is for comfort, softness and hydration rather than for changing the structure of the skin.
Source: DermNet
Vitamin E is an antioxidant, and it is often in a formula to keep the other ingredients stable rather than as the active itself. It pairs well with vitamin C, though on its own the evidence for visible change is limited.
A peptide-based moisturizer designed to address cellular aging by targeting senescent cells through the proprietary OS-01 peptide, along with nourishing ingredients like ceramides.
The gurus mostly approve it, but with enough reservations to keep it in the middle at a Guru Score of 74%.
OneSkin OS-01 Face Topical Supplement holds a Guru Score of 74%. That is our read on how warmly the experts talk about it, based on the verdicts of 12 expert reviewers we have collected.
OneSkin OS-01 Face Topical Supplement is generally suited to mature skin.
Lower-priced moisturizers the gurus still rate highly, versus this luxury pick.
See how they stack up →Other products the same gurus have weighed in on, plus more from this brand and category.
Compare side by side →Stories where our editors dug into this product or its brand.
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