Skincare
What Niacinamide and Retinol Each Do for Skin, According to Studies
Niacinamide is a vitamin B3 derivative that improves the appearance of hyperpigmented spots, red blotchiness, fine lines, and yellowing at the 5% strength tested in clinical research. In a 12-week double-blind study published in Dermatologic Surgery, 50 women applied 5% niacinamide to half of…