Anne 3 I choose this one because of BHA and cheap prices. It can’t be compared with Ances 25 or Senacure which contain 0.5% BHA. Since it is just cosmetic, and I don’t know how much BHA is, but for sure it is less than 0.5%. After 1 week of using, I see the sign of acnes reduction. It think it will take a little more time to remove all acnes at back. Wish that maker could increase BHA % up to 0.5 for quick result.One good thing is that when turning upside down the bottle to spray for back, the liquid was not leak. I still remember when I used Acnes 25, the liquid was leak when bottle was turned upside down.