About MK-677 (Ibutamoren)
MK-677 (Ibutamoren) is an orally active growth hormone secretagogue that raises 24-hour mean GH and IGF-1 by ~40% at 25 mg daily. US-manufactured capsules tested to ≥ 99.2% HPLC purity.
Reported benefits
- Raises 24-hour GH and IGF-1 by ~40%
- Once-daily oral capsule, no injection
- Improves deep sleep architecture
Research citations
- Nass et al. 2008 - Annals of Internal Medicine
- Murphy et al. 1998 - JCEM
How MK-677 (Ibutamoren) fits the category
MK-677 (Ibutamoren) sits inside the Best Peptides for Muscle Growth category. For the full ranking and head-to-head comparisons, read Best Peptides for Muscle Growth.