If your skin is dry, acne-prone, wrinkled, generally lacks luster then it is time to learn about pH balances and their effect on your skin. A pH level of 5.5 is perfect because this allows some acids onto your skin to naturally fight off bacteria that usually leads to breakouts. Medix 5.5 anti-aging retinol cream promotes smooth, firm, healthy looking skin by reducing the look of sun damage and supporting a strong skin barrier that holds in moisture and keeps pollutants out. Infused with Retinol and Ferulic Acid to improve the look of sagging while leaving your skin feeling hydrated and smooth. Retinol cream can be used as a nighttime moisturizer and be applied with any facial serum.