Retinol Plus Vitamin C Skin Refining Night OilDermatologists have recommended Retinol and Vitamin C for decades as the one two combo to effectively improve the look of dark marks and brighten the appearance of skin tone, while helping to support collagen to firm the look of skin and reduce the appearance of lines and wrinkles. However, layering those two powerful ingredients requires multistep routines and sometimes causes irritation especially for sensitive skin. Dr. Beal believes skin care