Description
FST 344, also known as Follistatin 344, is a naturally occurring peptide in the body. It is a synthetic version of the naturally occurring human follistatin protein. Follistatin is found in nearly all tissues of higher animals and is encoded by the FST gene. This peptide is part of the follistatin family and is a monomeric glycoprotein consisting of 344 amino acids. Its primary function includes the binding and bioneutralization of members of the transforming growth factor-beta (TGF-β) superfamily, particularly focusing on activin, a paracrine hormone. Follistatin 344 plays a crucial role in muscle growth, fertility, and preventing skeletal muscle fibrosis by inhibiting myostatin, a protein that restricts muscle growth.
It’s important to note that while Follistatin 344 has been explored for its potential in increasing muscle mass and other benefits, its use is primarily limited to research purposes. The scientific community continues to study its effects and potential applications, including in the context of bodybuilding and muscle development, where it has gained attention for its ability to increase muscle mass beyond natural limits.


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