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or if you simply prefer a tingle-free vitamin C
Both use 20% L-ascorbic acid
C20 Ferulic — Adds Ferulic Acid
Supports firmness
Get all three — Original
C15 CelSignal MAP Serum or if you simply preferVitamin C for skin that struggles with L ascorbic acid. Built on 15% magnesium ascorbyl phosphate (MAP) a mild vitamin C that converts in the skin at a comfortable pH 5. 5, with niacinamide and hyaluronic acid. Why fresh matters Traditional L ascorbic acid is powerful, but its low pH and strength can be too much for reactive skin. MAP (magnesium ascorbyl phosphate) is a gentler, more stable vitamin C that converts to active vitamin C in the skin so
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