Follistatin is a naturally occurring glycoprotein that binds members of the transforming growth factor-beta family, including activin. Its interaction with myostatin has made it a significant subject of muscle-development research.
Experimental studies have explored follistatin’s potential influence on skeletal muscle growth, reproductive biology, and tissue signaling. Different follistatin isoforms also have distinct biological characteristics.
Follistatin-based interventions remain an area of research rather than an established general clinical treatment for muscle development. Biological activity depends heavily on the specific isoform, formulation, and delivery method.
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