YK11 (also known as Myostine) is a unique selective androgen receptor modulator (SARM) that activates androgen receptors (AR) [1]. Studies show that YK11 induces myogenic differentiation and selective gene regulation, and up-regulates osteoblastic proliferation and differentiation in MC3T3-E1 cells [2][3]. YK11 has also been used as a basis for designing antimicrobial peptides with improved activity and less cytotoxicity [6]. YK11 blocks the N/C-interaction required for the full-agonistic function of wild-type AR, inducing selective AR-target genes owing to the constitutive transactivation potential of AF-1 subdomain in endogenous AR-expressing MDA-MB 453 cells [7].
CAS: | 1370003-76-1 |
Molecular Weight: | 430.541 g/mol |
Chemical formula: | C25H34O6 |
Chemical name: | (methyl 2-{5-methoxy-5,15′-dimethyl-5′-oxospiro[1,4-dioxolane-2,14′-tetracyclo[8.7.0.0²,⁷.0¹¹,¹⁵]heptadecan]-6′-en-3-ylidene}acetate |
Type: | Myostatin Inhibitor |
- Stimulates muscle growth and strength
- Enhances fat loss and body composition
- Commonly stacked with other SARMs / AAS
- Limited research and long-term safety data
- May cause temporary testosterone suppression
YK11 Myostine For Sale
Discover our distinguished lineup of YK11 sources, handpicked for their exceptional products and trustworthy shipping. Tap into our expertise as we assist you in harnessing the muscle growth and strength-boosting capabilities of YK11. Set forth on your fitness odyssey with the reassurance of the industry’s most reliable providers.

Sports Technology Labs

Behemoth Labz
Science.bio They're Back!
You can view the full list of verified sources here