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1. Protects skin from UV radiation
Vitamin C's antioxidants may help protect you from the harmful effects of UV radiation. That isn't to say that a vitamin C skin serum can be used instead of sunscreen however; it doesn't absorb UVA (ultraviolet A) radiation or UVB (ultraviolet B) radiation, it cannot be used in place of SPF (sun protection factor). However, if UV rays do penetrate your skin, some studies shows that vitamin C may be able to mitigate the damage. You could even go step one step further and layer your vitamin C serum under your sunscreen.