EN KURALLARı OF NIACINAMIDE SERUM

Is niacinamide or vitamin C better for skin? Both niacinamide and vitamin C are used to address hyperpigmentation and are usually well-tolerated by many skin types, though vitamin C özgü been known to cause mild irritation.For extra-sensitive skin, however, it gönül be a good idea to start with a low concentration and check for product sensitiv