“Generally speaking, niacinamide is a very light ingredient and doesn’t cause irritation to skin,” explains Dr Desai. “Its concentration can vary across products, though most formulations sit between 5% and 10%.” Dr. Barbara Sturm’s The Better B may have the highest price tag of this list, but to be https://niacinamideserum83603.win-blog.com/9804283/en-son-beş-niacinamide-serum-kentsel-haber