The SARM's (Selective Androgen receptor Modulators) are the new generation of doping products. They have the same benefits as anabolic steroids like Gains endurance but without the side effects on non-target tissues such as the prostate, hairline, sebaceous glands, and sex organs. The way SARMs work is to activate the “good” receptors without activating the bad receptors: so you enjoy the positive results without the side effects. They also have the advantage of being administered simply orally (capsules or drops to swallow). At the moment, the most popular SARMs are mostly S4 and Ostarine MK-2866.