Beijing Nuoxuan Kangle Biological Science and Technology Co.ltd.

Product Name:Follistatin 344

Alias:FST

Appearance:White to off-white crystalline powder or lumps

Grade:Reagent Grade

Specification:1mg/vial

Follistatin Benefits

Follistatin also known as activin-binding protein is a protein that in humans is encoded by the FST gene.Its primary function is the binding and bioneutralization of members of the TGF-β superfamily, with a particular focus on activin, a paracrine hormone.

Follistatin is fascinating protein that can increase muscle mass beyond natural potential by suppressing myostatin.Follistatin, specifically Follistatin 344 (FS344), quickly gained popularity in the bodybuilding community as a potential supplement to rapidly increase lean tissue mass. Another protein, follistatin-related gene (FLRG) acts on similar pathways as FS344 regarding its muscle building properties. Increased lean tissue mass could give a bodybuilder an advantage in a competitive setting and be the differentiating factor between first and second place.

Functional Mechanism

An earlier name for the same protein was FSH-suppressing protein (FSP). At the time of its initial isolation from follicular fluid, it was found to inhibit the anterior pituitary's secretion of follicle-stimulating hormone (FSH).

Follistatin works by binding to and inhibiting transforming TGF-β peptides such as myostatin which is responsible for regulating and limiting muscle growth. It's also worth pointing out that myostatin may have a regulatory role in skeletal muscle fibrosis; too much myostatin can impair tissue function and cause chronic disease in vital organs, tissues, and bone marrow.

In additional to suppressing the degenerative properties of myostatin, follistatin also suppresses the pituitary gland synthesis and secretion of follicle-stimulating hormone (FSH). High FSH levels in men may indicate that testicles are not functioning correctly; this condition limits muscle growth, recovery, and normal hormonal function. However, FSH levels that are too low can also negatively impact health and reproductive capabilities.