Product benefits

Skincare serum bottle with 'Vitamin U' branding on a white background Skincare serum bottle with 'Vitamin U' branding on a white background

Brighter, More Radiant Skin

Niacinamide gently evens out tone and brings back that soft, healthy glow—lovely for when daily life leaves your complexion looking a bit tired and dull.

Smoother, Softer Wrinkles

Vitamin U, adenosine, and Syn-Ake work quietly together to relax fine lines and expression creases, giving your skin a rested, smoother feel day by day.

Firmer, Plumper Elasticity

Volufiline and the peptide blend—including EGF and palmitoyl pentapeptide—gently restore bounce and volume, helping skin feel stronger and more lifted as time goes on.

Deep, Comforting Nourishment

The rich Vitamin U complex delivers nutrients and hydration to dry, sensitive skin, protecting against everyday stressors so your complexion stays calm and comfortably moisturized.

Brand: CUSKIN

Discover CUSKIN: Clinic-Born Korean Cosmeceuticals for Real, Lasting Skin Health

Professional Dermatology Meets Everyday Luxury Founded by dermatologists. Since 2001, CUSKIN has been rooted in a trusted network of specialist clinics treating over 300,000 patients annually.

Our philosophy: “Skin Function Restoration” — healthy, resilient skin that glows from within, not just temporary perfection. We combine natural sources and pharmaceutical-grade actives for sustainable results you can feel.

The Ultimate Synergy Effect Real patient feedback from our clinics flows directly into our in-house R&D center and CGMP-certified factory. This closed-loop system — clinics → analysis → innovation → products — ensures every formula solves actual skin concerns with proven efficacy.

Our Specialized Lines: Targeted Care for Every Skin Journey

CLEAN-UP Your gentle daily foundation for clear, balanced skin. Ideal for sensitive, acne-prone, oily, or combination types. Low-irritation essentials purify without stripping, calm redness, control sebum, and refine pores.

CU Dr. Solution Barrier repair and deep hydration heroes for damaged, dehydrated, or sensitive skin. Powered by probiotics (Bifida Ferment), PDRN (salmon DNA), ceramides, niacinamide, and hyaluronic acid. Soothe irritation, boost elasticity, and lock in moisture with bestsellers like Bifida Barrier Ampoule and Cicaming Lotion — perfect for post-treatment recovery or everyday resilience.

CU: Vitamin U Intensive anti-aging programs featuring our exclusive patented Vitamin U (Methylmethionine Sulfonium). Clinically proven to accelerate healing, reduce wrinkles, firm skin, and protect against damage..

All formulas are clean, conscious, and rigorously tested — vegan-certified (Korea & Italy), natural organic approved, no harsh additives.

Backed by Science & Global Trust

  • In-house R&D since 2006 → Collaborations with Seoul National University & Yonsei University, SCI-level publications.
  • State-of-the-art CGMP & ISO 22716 facility for premium quality.
  • 20+ years of innovation.

Join tens of thousands of K-Beauty lovers worldwide who choose CUSKIN for clinic-proven, gentle-yet-powerful results.