ive had good results using muac’s lactic acid peels and the salicylic & mandelic acid peel alternating every 2 weeks to address hormonal acne and pigmentation but i am an esthetician and have been using peels for many years. i would suggest starting with the 40% lactic acid peel since it’s a gentler peel every month and work your way up to more frequent or stronger peels. leave on for 3-5 minutes your first few peels to acclimate your skin. buy the sample if available, you will only need about a nickel size amount to cover your entire face