MK-677 is primarily known for its ability to increase growth hormone (GH) and insulin-like growth factor 1 (IGF-1) levels in the body, which can have various potential benefits for muscle growth, fat loss, and overall health. Growth Hormone Stimulation: MK-677 stimulates the secretion of growth hormone from the pituitary gland, leading to an increase in GH levels. This effect is thought to contribute to muscle growth, fat reduction, and enhanced recovery. Improved Sleep and Recovery: Some users report improved sleep quality and faster recovery times when using MK-677, likely due to its influence on growth hormone and IGF-1 levels.