Growth Hormone Secretagogues

MK-677

Also known as: Ibutamoren, Ibutamoren Mesylate, MK-0677, L-163,191

Orally active ghrelin-receptor agonist that raises GH and IGF-1 while preserving the natural feedback axis. Its strongest effect is on deep slow-wave sleep. Note: increases appetite and can affect insulin sensitivity.

Pharmacokinetics

Half-life
1 day
Time to peak
2 hours
Bioavailability
70%
Onset
1 hours
Dosing interval
24h

Administration

Primary routes
Oral
Category
Growth Hormone Secretagogues

Safety Flags

  • Contraindicated in cancer history

Storage

  • · Room temperature stable

Used in 2 outcome protocols

Simulate MK-677

Pinned.life runs a 1-compartment Bateman pharmacokinetic simulation against 38 peptides in real time. Build a stack, see serum-level curves, get warned about peak overlaps and drug-peptide interactions.