This Derm-Approved Ingredient Combats Acne, Oily Skin & More – Refinery29

By | July 8, 2019

Interestingly, Dr Ewoma highlights research which has shown that applying niacinamide prior to using retinol (usually associated with skin sensitivity including peeling and redness) may increase the skin’s tolerance, so if your skin is reactive to retinol, it might be worth consulting niacinamide first. Dr Ewoma also notes that niacinamide is a great skincare ingredient to use before your period. “I personally love to use niacinamide 1-2 weeks before. It helps prevent any breakouts and to manage the increased sebum production many women tend to experience at this time during their cycle.”
"allergy|acne" – Google News