Effaclar K is the best stuff I've ever used to keep my skin from breaking out. I used to use a product from another line but when it was discontinued I had to try other things. La Roche Posay is not an inexpensive line of skin care, so I was a little skeptical about purchasing Effaclar K. I am in my 50s, so I didn't want anything that was overly drying. When I started to use this lotion, I couldn't believe how well it worked with no bad side effects at all. It is really worth the price.