Follistatin 344 (95%) (1mg)

Myostatin Inhibitor

Follistatin 344 is one of the natural isoforms of follistatin—a protein that binds and inhibits myostatin and activin. Inhibiting myostatin removes a key brake on skeletal muscle growth, with significant research interest for muscle wasting and performance.

The Science

What is Follistatin 344?

Follistatin is an endogenous protein that binds members of the TGF-β superfamily, most notably myostatin (GDF-8) and activin, neutralizing their effects.

Myostatin is a negative regulator of skeletal muscle mass—animals and humans with myostatin deficiencies display dramatic muscle hypertrophy.

Follistatin 344 is the 344-amino-acid isoform researched for its potent myostatin-binding activity and potential to support muscle growth, recovery, and counteract muscle wasting.

Laboratory Observations

Key Observed Effects of Follistatin 344 (95%) (1mg)

Muscle Growth

Supports skeletal muscle hypertrophy by inhibiting myostatin.

Recovery Support

May enhance recovery and adaptation to training stress.

Muscle Wasting Research

Investigated for conditions involving muscle atrophy.

Body Composition

Supports lean mass goals alongside training and nutrition.

Mechanism of Action

Follistatin 344 binds and neutralizes myostatin, releasing the brake on muscle growth.

Myostatin Binding

Sequesters circulating myostatin, preventing its inhibitory action on muscle growth.

Activin Inhibition

Also binds activin, contributing to broader effects on muscle and tissue.

Pro-Hypertrophic Signaling

Removing myostatin's inhibition allows satellite cells and muscle fibers to grow.

Research-Only Notice

Follistatin 344 (95%) (1mg) is categorized by the FDA as for research-purposes-only. It is not intended for human consumption, diagnosis, treatment, cure, or prevention of any disease. The information above summarizes effects observed in laboratory studies to date and is provided strictly for scientific and educational reference.