MK-677 (Ibutamoren)

What is MK-677?

MK-677 is also called Ibutamoren. It comes as a tablet, not an injection.

MK-677 is a growth hormone secretagogue. A secretagogue is a compound that triggers a hormone to be released. It acts like ghrelin, a hormone that binds to the ghrelin receptor in the brain.

MK-677 is not a SARM. A SARM is a selective androgen receptor modulator, a different type of compound. MK-677 works through the ghrelin receptor instead.

What researchers study it for

• Growth hormone release. Researchers study how it raises GH (growth hormone) and IGF-1 levels.
• Ghrelin receptor activity. Studies look at how it binds to the ghrelin receptor in the brain.
• Muscle tissue. Labs study how higher GH and IGF-1 levels affect muscle cells.
• Fat breakdown. Researchers study its effect on fat oxidation. That is how the body breaks down fat for energy.
• Sleep patterns. Some studies also look at how it affects sleep patterns.

What you get

One bottle of 60 tablets. Each tablet holds 10 mg of MK-677.

How to store it

Keep the tablets in a cool, dry place, away from light.

Words you might not know

• Secretagogue — a compound that triggers a hormone to be released.
• Ghrelin — a hormone that binds to receptors in the brain.
• GH — growth hormone, made by the pituitary gland.
• IGF-1 — insulin-like growth factor 1, a hormone linked to GH.
• SARM — selective androgen receptor modulator, a different research compound.

Sold for laboratory research only. Not for human consumption.