What does a vitamin C serum do? 'Vitamin C is a staple for so many skin concerns,' explains facialist Abigail James. 'It's an antioxidant, which means it can protect against free radical damage ...
A derivative of Vitamin ... retinol for yourself, the brand recommends using the serum one to two times per week to start with, before increasing if your skin can tolerate it. Apply in the PM ...
Along with retinol ... for the type of vitamin C being used. 'L-ascorbic acid or ascorbic acid is more stable than others and will maintain its strength longer.' The great thing about vitamin C is ...