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, which 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