oneskin PREP Gentle Exfoliating Facial Cleanser — 200 mL, fragrance-free, boosts peptide absorption & hydration

OneSkin PREP is a gentle daily exfoliating gel that removes impurities and light makeup while priming skin to absorb the brand’s OS-01 peptide and support hydration.

PREP by OneSkin is formulated as a first-step cleanser designed to cleanse without stripping, increase peptide uptake, and support skin hydration biomarkers. This fragrance-free, dermatologist-tested gel lathers into a light foam and is suitable for all skin types. It’s free of sulfates and harsh detergents and carries the National Eczema Association Seal of Acceptance, making it a reliable choice for sensitive and reactive skin routines.

How does PREP prepare skin for the rest of my skincare routine?

Using PREP before your treatment serums or creams helps reduce surface build-up and allows active ingredients to reach skin more effectively. Clinical testing shows it increases absorption of the OneSkin OS-01 peptide, so follow-up products can perform closer to their potential.

• Shown to increase OS-01 peptide absorption by 2.2x when used before OS-01 FACE.
• Gently exfoliates to remove dead cells and surface oils that block penetration.
• Lathering gel texture leaves skin ready for serums and moisturizers.

Will PREP dry out or irritate sensitive skin?

PREP is formulated to cleanse without stripping the skin’s natural lipids, making it suitable for sensitive skin and those prone to dryness. It’s free from fragrance, detergents, and sulfates, and has been dermatologist-tested with the National Eczema Association recognition.

• Non-stripping ingredients help preserve the lipid barrier and skin microbiome.
• Fragrance-free and sulfate-free to minimize irritation risk.
• Safe for all genders and common skin types, including reactive skin.

How should I use PREP in my morning and evening routine?

Dispense 1–2 pumps into damp hands and work into a light foam, then massage gently over damp skin and rinse. Use twice daily—morning and night—to maintain clean skin that will better absorb subsequent treatments.

• Morning: cleanse to remove overnight oils and prepare for daytime serums and SPF.
• Evening: remove light makeup and impurities before applying night treatments like OS-01 FACE.
• Apply 1–2 pumps on damp skin, circular massage, then rinse thoroughly.

What measurable skin benefits can I expect from using PREP?

PREP supports routine performance by improving delivery of the OS-01 peptide and increasing a key hydration biomarker in skin. While individual results vary, these effects help enhance hydration and make active products more effective.

• Improves OS-01 peptide absorption by 2.2 times when used prior to peptide treatment.
• Boosts a hydration biomarker to support lasting moisture from the first step.
• Maintains healthy skin balance through gentle cleansing agents.

Who is this for: PREP is for anyone who wants a mild, science-backed daily cleanser that primes skin for high-performance actives—particularly users of OneSkin’s OS-01 peptide system. It’s a good fit for sensitive, dry, combination, and normal skin, and for those seeking fragrance-free, dermatologist-tested cleansing that won’t compromise the skin barrier.

• Features: Improves peptide absorption, boosts hydration biomarker, preserves lipid barrier, fragrance- and sulfate-free, dermatologist-tested, National Eczema Association Seal.
• Directions: Dispense 1–2 pumps into damp hands, lather into a light foam, massage onto damp skin in circular motions, rinse thoroughly; use morning and evening.