"i started using differin when i was 12. i was going through puberty and getting the worst acne anyone has ever seen. i saw significant improvements in my skin immediately. on the downside, it dries some parts of my face and has increased oiliness in other parts, so now every morning i wash my face and apply moderate-strength moisturizer. it doesn&#039;t prevent blackheads, and i still get some pimples and boils here or there. now i am 20 and still apply it to my whole face every night."