DR.K C Control Repair Serum
DR.K

DR.K C Control Repair Serum

ドクターケイ Cコントロールリペアセラム
skincare serum

A vitamin C focused booster serum developed by a dermatology clinic in Aoyama, Tokyo. Contains 8 types of vitamins in a "cocktail vitamin" formula centered on a fast acting vitamin C derivative at 1.5x the concentration of its predecessor. Also includes retinol derivatives, B vitamins, glutathione, an NMN derivative (for skin firmness), and a tripeptide complex. Designed as a first step serum applied right after cleansing, before toner. Won 1st place in the @cosme Best Cosmetics Awards 2025 (second half) new serum category, and swept multiple Japanese beauty magazine awards including Biteki and VOCE. The texture is watery and absorbs fast, closer to a toner than a traditional serum. Free of mineral oil, synthetic colorants, synthetic fragrance, parabens, alcohol, and silicone. At 9,350 yen it sits firmly in the premium tier, but the clinical pedigree and award sweep justify the positioning.

Key Ingredients
Vitamin C Derivative Retinol Derivative Glutathione NMN Derivative
FAQ
Why is this so expensive for a vitamin C serum?
It's a dermatology clinic product from Aoyama, Tokyo, not a mass market brand. The formulation includes 8 types of vitamins (including a high concentration vitamin C derivative, retinol derivative, glutathione, and an NMN derivative) in a cocktail designed for clinical results. It also swept multiple Japanese beauty awards in 2025, which drove demand.
Do I use this before or after toner?
Before. The instructions say to apply it right after cleansing, on bare skin, then follow with your toner and other steps. The watery texture absorbs fast and preps skin for the rest of your routine.

No US retailers currently listed for this product.

This may be a Japan-only product.

Learn More

Buying Guide Best Japanese Anti Aging Skincare: Products That Deliver Results Buying Guide Best Japanese Ceramide Skincare Products for Barrier Repair

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