YK-11 is a hybrid compound that acts as a selective androgen receptor modulator (SARM) and a myostatin inhibitor, making it one of the most potent muscle-building agents available in modern performance enhancement. By binding to androgen receptors and simultaneously blocking myostatin, YK-11 allows for unrestricted muscle development and increased muscle density.

This 30ml formula contains 300mg total (10mg/ml), offering:

• Accelerated lean muscle growth

• Enhanced strength and power output

• Increased muscle hardness and vascularity

• Improved recovery and muscular endurance

Unlike traditional SARMs, YK-11 also stimulates follistatin production, which helps inhibit myostatin—a protein that limits muscle growth. As a result, users often experience fast, dry gains and an overall more muscular and refined appearance.

While non-aromatizing, YK-11 is moderately suppressive to natural testosterone, so a proper post-cycle therapy (PCT) is necessary. Due to its high potency, it’s generally recommended for experienced users who are already familiar with SARMs and advanced cycle planning.

Common cycles last 4–8 weeks, with daily doses of 5–15mg. It can be used solo or stacked with other SARMs like RAD-140 or LGD-4033 for synergistic mass-building effects.

Ideal for users seeking maximum muscle growth, hardening, and advanced physique development, YK-11 is a unique and powerful option for pushing physical limits.