Follistatin 344 (FST344)

Introduction

FST 344, commonly referred to as Follistatin 344, is a peptide that occurs naturally within the human body. It represents a synthetic variant of the endogenous human follistatin protein. Follistatin is present in nearly all tissues of higher organisms and is encoded by the FST gene. This peptide belongs to the follistatin family and is characterized as a monomeric glycoprotein composed of 344 amino acids. Its primary role involves binding to and neutralizing members of the transforming growth factor-beta (TGF-β) superfamily, with a particular emphasis on activin, a paracrine hormone. Follistatin 344 is essential for muscle growth, fertility, and the prevention of skeletal muscle fibrosis by inhibiting myostatin, a protein that limits muscle development.

It is crucial to recognize that while Follistatin 344 has been investigated for its potential to enhance muscle mass and other advantages, its application is predominantly confined to research settings. Ongoing studies within the scientific community are examining its effects and possible uses, particularly in bodybuilding and muscle enhancement, where it has attracted interest for its capacity to promote muscle growth beyond natural limits.