So, I decided to buy this product after reading a lot of people raving about it in their reviews. I was going through a massive breakout (maybe because of stress ?.? )so I started to use it right after it arrived (very quickly, thank you Jolse/Bae ^^). After I started using it (like the same day of the day after), the cysts and pimples I was having flattened and became less red (and painful). Not sure that it's preventing acne, but since I've started using it I feel "secured" haha (I'm still getting pimples though!). Overall, I like this product and will repurchase (when I finish the bottle!! here's still so much left :) )