Greatest Kılavuzu NIACINAMIDE SERUM için
“Generally speaking, niacinamide is a very light ingredient and doesn’t cause irritation to skin,” explains Dr Desai. “Its concentration sevimli vary across products, though most formulations sit between 5% and 10%.”For extra-sensitive skin, however, it sevimli be a good idea to start with a low concentration and check for product sensiti