SkinCeuticals Glycolic 10 Renew Overnight is a powerful night cream containing 10% glycolic acid to exfoliate the skin and promote natural cell turnover. Combined with 2% phytic acid, which aids restoration of skin texture and tone, the overall result is a brighter, smoother and glowing complexion. Free of dye and fragrances, this nightly treatment is suitable for most skin types and ideal for extending the results of chemical peels. How to use: Initially, limit use to every second night to allow the skin time to adjust to the glycolic acid. Use a pea-sized amount and apply an even layer to the face and neck, avoiding the eye area Make sure to use an antioxidant and SPF in daytime. When using high-concentration glycolic acid, it is common to experience mild symptoms of skin detoxification such as redness Generally, these side effects resolve with continual use. After one week, if side effects have ceased, increase usage to every evening or as advised by a skincare professional.