Ostarine, also known as MK-2866 or enobosarm, is a selective androgen receptor modulator investigated for androgen-receptor activity. It is not FDA-approved for routine human use.

The XtLabs product is listed at 10 mg. The supplied information does not establish its dosage form, excipients, pack size, or manufacturing specifications.

FDA has warned that SARMs are unapproved drugs and has reported serious risks associated with SARM-containing products. Product identity and labeling should therefore be verified carefully.