Are you thinking of MSM ? It stands for MethylSufonylMethane. It is my understanding that it weakens or breaks down the cell walls of Candida cells and is good to take in conjunction with antifungals or herbal antifungals. With this product it is recommended to take Vitamin C along with it to aid the body in getting rid of resulting toxic dumping that will occur. It can be found at any health food store.