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 saf been known to cause mild irritation. Vitamin C serums, retinol, and hyaluronic acid may get a lot of attention, https://renk-e-itsizli-i64184.newbigblog.com/35723132/5-temel-unsurları-için-niacinamide-serum