Follistatin peptide is a protein that plays a role in muscle growth, strength, and repair by inhibiting the activity of myostatin, a protein that limits muscle growth. It’s found in nearly all tissues of higher animals and can be produced naturally or synthetically. Follistatin is also involved in other processes like reproduction and metabolism.
Follistatin is a natural antagonist to myostatin, a protein that restricts muscle growth. By blocking myostatin, follistatin can promote muscle development and repair.