MYO-S4 by Savage Line Labs’ active ingredient (S4) is a powerful Sarm, however it is most noted in research for it’s muscle protecting abilities especially during a reduced calorie intake period (fasting/dieting). It also has excellent fat burning and muscle building effects and strength increasing abilities even while reducing weight. Research has also shown that S4 can help to strengthen bones.

Due to the fact that S4 binds to androgen receptors selectively, it can increase strength and build lean muscle mass without creating water weight, drying out the joints, stressing the liver, or causing severe suppression or shutdown.