Sheds off the outermost layer of dead skin cells, induces renewal of a new layer, and increases the moisture level of the skin which improves the flexibility of the upper skin layer. Irie Rock serum with Glycolic Acid helps with fine lines,irregular pigmentation and age spots, also helps to decrease enlarged pores. Side effects of Glycolic Acids include mild irritation and sun sensitivity. Forthat reason, sunscreen also should be used every morning. To help avoid skin irritation with alpha-hydroxy acids, it is advisable to start with a product with concentrations of AHA of 2 to 3 percent. It is recommended on first usage that you gently introduce the product into your daily routine to and monitor any inflammation. You want to get your skin used to Glycolic Acids, so you should only initially apply the skin care product every other day, gradually working up to daily application