A steroidal compound claimed to act as a SARM and to raise follistatin (a myostatin inhibitor) in cell studies; there is no meaningful human evidence.
YK-11 is an unusual entry: it has a steroidal structure and is marketed as a SARM, but it's also claimed to work as a myostatin inhibitor.
The dual claim is that it both partially activates the androgen receptor and, based on cell studies, raises follistatin — a protein that blocks myostatin, the body's natural 'brake' on muscle growth. Releasing that brake is the theoretical basis for the muscle-growth hype.
This rests almost entirely on in-vitro work; there's essentially no human data. Its steroidal structure also raises liver and hormonal concerns, and it is not approved.
Searching the published record…
Searching the published record…
Searching the published record…
Studies are surfaced live from the U.S. National Library of Medicine (PubMed). biohackr indexes and links the published record; it does not host or alter source articles.