Vitamin C serum is the most popular type of serum. Everyone knows that Vitamin C is very good for the skin, so people prefer this serum to Vitamin A. The benefit of Vitamin C serum is that it works as an anti-oxidant.
Vitamin C can also work as collagen synthesis which can inhibit the aging process of the skin. Serum that contains Vitamin C also functions as an anti-inflammatory, which can treat skin that is injured due to sun exposure, acne, and so on.