Invigorating DHC Renewing AHA Cream is an exfoliating milky lotion that boasts a powerful 10% concentration of lactic acid to sweep away lifeless cells & reveal glowing, new radiance & a brighter complexion. Use at nighttime, once or twice a week. Sunburn Alert: DHC Renewing AHA Cream contains an alpha hydroxy acid (AHA) that may increase your skin's sensitivity to the sun & particularly the possibility of sunburn. Use a sunscreen, wear protective clothing & limit sun exposure while using this product & for a week afterwards.