35 Day Supply, Inject weekly for 5 doses, cycle off for 4 months: Follistatin 344 (FS-344) is a highly sought-after peptide primarily known for its powerful ability to significantly increase muscle mass and strength. It achieves this by acting as a potent antagonist to myostatin, a protein naturally produced by muscle cells that serves as a negative regulator of muscle growth. By binding to and neutralizing myostatin, FS-344 effectively removes the "brake" on muscle development, leading to both muscle cell hypertrophy (increase in cell size) and hyperplasia (increase in cell number). Research suggests this mechanism can lead to pronounced and sustained gains in lean body mass, making Follistatin 344 a key focus for those aiming to overcome genetic limitations and maximize their physical potential.