MK-667 (Ibutamoren)

Oral Tablet

MK-677 (also known as Ibutamoren) is an orally active compound that stimulates the body’s natural production of growth hormone (GH) and insulin-like growth factor 1 (IGF-1). It’s often grouped with performance-enhancing substances, though technically it is not a steroid or a traditional SARM (Selective Androgen Receptor Modulator). It works by mimicking the hormone ghrelin, which signals the brain (specifically the pituitary gland) to release more growth hormone. As a result, users may experience increased GH and IGF-1 levels over time without the need for injections. Commonly reported effects: Increased muscle mass and strength (indirectly, via GH/IGF-1) Improved recovery and sleep quality Increased appetite (a very common effect due to ghrelin activity) Potential fat loss or improved body composition over time Medical and research context: MK-677 has been studied for conditions like growth hormone deficiency, muscle wasting, and osteoporosis. However, it is not approved for general medical use in most countries and is typically sold as a “research chemical.”

All products sold by JA Performance Peptides are intended strictly for laboratory research purposes and are not approved for human consumption, veterinary use, or therapeutic application. Not for human use.