YK-11 is a synthetic selective androgen receptor modulator (SARM). It is a compound based on 5-α-dihydrotestosterone (DHT), which is a gene-selective and partial agonist of the androgen receptor (AR). YK11 is so far the only SARM that is able to increase the expression of the activin binding protein Follistatin (FST), and right the induction of FST plays a key role in its anabolic effects.

  • Increases the production of follistatin which inhibits the myostatin pathway which has shown enlargement in muscle mass and strength.
  • As a derivative of DHT, users can expect muscle hardness.
  • The stimulation of physical strength and endurance.
  • Improving the user’s athletic performance.
  • The development of muscle mass in the body.
  • Ideal to improve body composition.
  • Enhancing bone Density.


Rice Powder, Magnesium Sterate And Silicon Dioxide


The Demon Pharma Sarms team is compromised of pharmacists, medical scientists, naturopaths, ex-military personnel, biochemistry researchers and long serving personal trainers. This combination of skills helps us deliver to you, our customers unwavering quality and the greatest customer service.

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