Lactic acid peels are just one type of chemical peel, but they are preferred by many -- again, because of lactic acid's reputation as a gentler alpha hydroxy acid. You can use peels to improve wrinkles, some types of acne and discolorations on your skin.actic acid peels are just one type of chemical peel, but they are preferred by many -- again, because of lactic acid's reputation as a gentler alpha hydroxy acid. You can use peels to improve wrinkles, some types of acne and discolorations on your skin.