COSRX The Vitamin C 23 Serum Toner Absorbs readily

Absorbs readily

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Milde formule: Vrij van irriterende stoffen

COSRX The Vitamin C 23 Serum Toner Absorbs readilyA high strength vitamin C serum built on 23% pure L ascorbic acid the highest concentration COSRX produce, and among the most potent available without a prescription. This is a treatment product for experienced users, not an entry point. L ascorbic acid is the only form of vitamin C the skin can use directly, without conversion. It is also the most difficult to formulate: it demands a low pH to penetrate, and it oxidises rapidly on exposure to light,