I tried using this because i was getting adult acne on my chin (large recurring zits right before my monthly cycle). All this product has done is severely dry out my skin rather than prevent or treat acne. If you're looking for a way to get rid of premenstrual zits, What i've found to be more effective is to ice the zit immediately when you start to feel it forming under the surface. In addition to icing it, i also push the zit down while icing it, repeating that 3 times daily, but you have to start doing that before the zit has time to get bigger. I also put benzoyl peroxide spot cream on it. I've also noticed an improvement and less breakouts since i've been exercising 30 min a day several days a week, drinking more water and adding more raw fruits and vegetables to my diet, also taking low doses of vitamin B5 (pantothenic acid) supplements which is supposed to help balance hormones during that time of the month.