Ibutamoren

Research

Ibutamoren (MK-677)

Category
Growth Hormone
Aliases
MK-677, Nutrobal
Administration
Oral

How it works

  1. Ghrelin receptor (GHS-R1a) agonist, active orally

    It activates the same hunger-hormone receptor that injectable growth hormone peptides use, but in pill form.

  2. Sustained (24-hour) elevation of growth hormone and IGF-1 levels

    Unlike short-acting injections, it keeps growth hormone and IGF-1 elevated all day and night.

  3. Increases appetite via central ghrelin signaling

    It reliably increases appetite, since it works through your body's natural hunger-signaling pathway.

  4. Does not require injection due to oral bioavailability

    It was specifically engineered to survive digestion, which is why it doesn't need to be injected like true growth hormone-releasing peptides.

Result

Round-the-clock elevation of growth hormone and IGF-1 from a once-daily pill, though long-term use may affect blood sugar control. Common felt effects include increased appetite, fuller-feeling muscles from water retention, and deeper sleep.