In june this year I on a whim went and bought sulfur soap from my drugstore. Literally withing 4 days my moderate acne COMPLETELY CLEARED UP FOR THE FIRST TIME IN 5 YEARS. I was so happy, I thought i had found my miracle cure. It was the only thing i was using and then one month later the acne came back completely the same if not worse. Why did this happen? I bought a new bar and no luck.