I have hormonal, cystic acne and Mario Badescu products were recommended by my dermatologist. I purchased both this and the drying lotion and this is SO much better for cystic acne. It does not prevent acne, but it will definitely reduce the size and duration. The application is not messy (unlike the drying lotion) and you don't have to use much. This is sulphur based, which works wonderfully for cystic acne. I would also recommend using a sulphur soap once a day.