Myostatin Propeptide
Myostatin inhibitor · Also known as GDF-8 Propeptide, Myostatin Inhibitor Peptide
What is Myostatin Propeptide?
The natural propeptide region of myostatin that, when administered exogenously, binds to and inhibits mature myostatin, removing the body's natural brake on muscle growth.
Myostatin (GDF-8) normally limits muscle growth. Its own propeptide domain remains bound to the mature protein after cleavage, keeping it inactive. Exogenous myostatin propeptide can overwhelm this system and inhibit circulating myostatin.
Benefits & evidence
How it works
Myostatin is secreted as a precursor protein. After processing, the propeptide region remains non-covalently associated with the mature growth factor, keeping it latent. By flooding the system with additional propeptide, more circulating myostatin can be trapped in its inactive form.
In animal studies, myostatin knockout or inhibition leads to dramatic muscle hypertrophy (the 'double muscled' phenotype seen in Belgian Blue cattle). However, replicating these effects with exogenous propeptide in humans has been difficult due to dosing and delivery challenges.
Dosing information
Typical dosing protocol
Not well established
Not well established
No standardized human dosing protocol. Animal research only.
Side effects
Most side effects tend to improve as your body adjusts.