Best Peptides for Muscle Growth & Body Composition
Peptides studied for muscle hypertrophy, strength, and body composition optimization
Muscle growth peptides primarily work through the growth hormone / IGF-1 axis. By stimulating GH secretion or directly activating IGF-1 signaling, these compounds promote protein synthesis, nitrogen retention, and lean body mass development.
This category overlaps significantly with GH peptides but focuses specifically on compounds with the strongest evidence for body composition effects — including myostatin inhibitors like Follistatin 344 and direct IGF-1 analogs like IGF-1 LR3.
Muscle Growth & Body Composition Peptides (2)
Follistatin 344
Follistatin is a naturally occurring protein that blocks myostatin, a molecule that limits muscle growth. It is being studied for muscle wasting conditions and performance enhancement. Gene therapy approaches using follistatin are also in development.
MGF (Mechano Growth Factor)
MGF (Mechano Growth Factor) is a natural variant of the IGF-1 gene that the body produces in response to muscle being stretched or loaded during exercise. Research focuses on muscle repair, activation of muscle stem cells, and recovery from exercise-related damage.