oneskin PREP Gentle Gel Facial Cleanser — Fragrance-Free, Dermatologist Tested for Sensitive Skin, Boosts Peptide Absorption

This everyday cleanser is formulated to cleanse without stripping, making it suitable for sensitive and all skin types. PREP is dermatologist tested, fragrance-free, vegan, cruelty-free, and free of sulfates and harsh detergents. Designed to be used before OneSkin OS-01 FACE peptide treatment, PREP helps increase peptide penetration so you get more benefit from your follow-up serums.

How does PREP cleanse without upsetting sensitive skin?

PREP uses gentle surfactants and balancing ingredients to lift oils, sunscreen, and impurities without removing the skin’s protective lipids. The formula avoids common irritants and detergents that can dry or inflame delicate skin.

• Fragrance-free, vegan, and cruelty-free formulation
• No sulfates or harsh detergents that strip lipids
• Dermatologist-tested for tolerance across skin types
• Light foaming gel texture that rinses clean without residue

Will PREP really help the OS-01 peptide work better?

Yes—lab studies show using PREP before the OS-01 FACE peptide increases peptide penetration, helping active ingredients reach deeper layers. That improved delivery can amplify downstream benefits measured in hydration-related biomarkers.

• Lab-tested to double peptide penetration when applied before OS-01 FACE
• Associated with a measurable 40% increase in an AQP3 hydration marker in studies
• Prepares skin by removing surface buildup that can block absorption
• Simple pre-step in any peptide-focused regimen

How do I use PREP in my routine for best results?

Use PREP as your first cleansing step on damp skin, morning and night. Lather 1–2 pumps in wet hands, massage gently in circular motions, then rinse and pat dry before applying your peptide treatment or moisturizer.

• Dispense 1–2 pumps and create a light foam in damp hands
• Gently massage across damp face in circular motions
• Rinse thoroughly and lightly pat skin dry—follow with OS-01 FACE
• Safe for daily use and compatible with most active serums

What ingredients and safety features should I expect?

PREP is formulated to maintain the skin microbiome and natural lipid barrier while remaining effective at cleansing. The product avoids fragrances and sulfates, aligning to clean-beauty standards and dermatological safety testing.

• Formulated to preserve natural oils and skin balance
• Free of fragrance, sulfates, and harsh detergents
• Vegan, cruelty-free, and suitable for all genders
• Dermatologist-tested to confirm tolerability on sensitive skin

Who is this for? OneSkin PREP is made for anyone who wants an effective yet gentle daily cleanser—especially people using peptide treatments like OS-01 FACE, those with sensitive or reactive skin, and anyone seeking a clean, non-stripping formula that primes skin for better product absorption.