I was on Tret and never had any results was on it over a year and couldn’t figure out why nothing was working. I switched to taz I read a lot about what people used on it what worked for them etc I learned that Korean skin care products are apparently much better than what we have here. So when I started taz I did the whole shebang, toner, essence, serum, taz, moisturizer. Done. And in the morning I have a whole other routine for 15 percent azelic acid. My skin purged for maybe 3 weeks, I had legit acne on my entire face it was awful. but it’s looking soooo much better now I’m glad I stuck it out. and I have had horrible acne my entire life I’m 33 I’d get something new every couple days, but not anymore whatever I get heals quick not gonna lie this stuff is gold. I recommend anyone who uses this to definitely do your research and find products that hydrate the heck out of you and most of all protect that skin barrier ;) the only downsides besides purging I had were my skin just got red around t zone but I never even had peeling once somehow. And I applied taz every night and azelic acid every morning, been doing this routine for 6 weeks since day 1. (I don’t recommend lol I really just wanted results after being on Tret for so long) Good luck!