Why does my skin burn intensely when I apply vitamin C serum to my face?
1. Introduction A burning sensation when applying vitamin C serum occurs due to the exceptionally low pH required to keep the active ingredient, L-ascorbic acid, chemically stable. This profound acidity temporarily disrupts the natural lipid barrier of the skin, irritating the superficial sensory nerves located within the epidermis. If the epidermal barrier is already compromised … Read more