How to Layer Active Ingredients: Niacinamide, Vitamin C, AHA/BHA, Retinols, and More!

With SO MANY ingredients out there, how do we know which ones work well together?! Today, we give you guys the best skincare ingredient combinations that can truly work magic for your skin. These include vitamin A (retinoids), vitamin B3 (niacinamide), vitamin C and all its derivatives, the acid family (glycolic, lactic, mandeli...