I have had one peel at my dermatologist office for $90 three weeks ago. Decided I can do this! Paid total of $28 plus shipping for 25% TCA and Neutralizer (separate sellers) on Amazon. Applied the first peel today and can tell you, it was a kicker compared to what the dermatologist gave me. The dermatologist said their peel was 30%...I question that given the difference with this 25%. Maybe it is just because this is my second peel. Will share the results as I go!