... weight: 304.47 Appearance: White powder,soluble in acetone, ethanol, ethyl ether, ethyl acetate, insoluble in water. Assay: 99percent Delivery ... : Mesterolone had seen widespread use in bodybuilding primarily for antiestrogenic activity in anabolic steroid stacks but such use ... treatments. The drug has shown to be beneficial in treating sexual dysfunction, impotency and low libido. Mesterolone ...