Should Niacinamide and L-Ascorbic Acid Be Used Together?

Personal/Inspirational, Skin Care

These days, while it’s (more) common knowledge that acidic compounds like hydroxy acids should not be used with retinol, the interaction between two other prominent and well-studied compounds: niacinamide and L-ascorbic acid, is rarely discussed. Ironically, along with hydroxy acids and retinoids, these two compounds to a great extent constitute and represent four of the Read more »