I am 22 y.o. and still acne prone, especially if I run gear. My back stomach and chest get it pretty bad. Whats the best way to prevent acne without using Retin A? Vitamin b5 and a topical anti-dht maybe? Also i have tetracycline that hopefully will help. Please give any experience other than what you have read about or heard about, I want to know what actually worked for people and how they did it.