Andarine S4 is a SARM that is often used for cutting and burning excess body fat by bodybuilders. Even though its use in bodybuilding supplements is illegal, a lot of bodybuilders still use it. Otherwise, it is a drug that could help treat conditions such as muscle wasting, osteoporosis, benign prostate hypertrophy, etc. Having said that, it is important to keep in mind that SARMs (including Andarine S4) are not approved by the FDA for human consumption.