mary kay clear proof acne system set mary kay with the clear proof acne system, you get an effective regimen clinically shown to provide clearer skin in just 7 days.* but it’s more than just fast results that makes an acne system worthy of your attention. to truly get your acne under control takes a consistent program with results over time. in an extensive 12-week independent clinical study conducted under the supervision of a dermatologist, people showed continued improvement in their skin during 12 weeks of use.* to build on this excitement, we also asked people from coast to coast to try the clear proof acne system and share their thoughts. the results were clear. three out of four people said they would switch to the clear proof acne system. why? because they said it clears up pimples faster than their previous regimens. and that says a lot.