C.E.O. 15% Vitamin C Brightening Serum

A vitamin C serum using tetrahexyldecyl ascorbate, an oil-soluble and more stable form of the ingredient than pure ascorbic acid, at a 15% concentration. Glycolic acid is mixed in for mild exfoliation, and soybean sterols help calm any sensitivity that can come with vitamin C. One of Sunday Riley's longer-running products, aimed at dullness and uneven tone.

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