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MK-677 (Ibutamoren)
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This product has been independently tested by a licensed, accredited laboratory and has passed all quality and purity standards.

ProductMK-677 (Ibutamoren)
Latest LotSIG-2026-0312
TestedMar 10, 2026
ResultPassed — ≥99%
Verified ByNFC + Blockchain
● In Stock

MK-677 (Ibutamoren)

12.5mg
FormCapsule
Vial Size60ct
Purity99%
ManufacturerUSA

Volume Pricing

Per unit — bulk discounts applied automatically
1–9vials
$65.00
10–24vials
$58.50Save 10%
25–49vials
$52.00Save 20%
50+vials
$46.00Save 29%
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About MK-677 (Ibutamoren)

A non-peptidic, potent, long-acting, orally-active, and selective agonist of the ghrelin receptor and a growth hormone secretagogue. MK-677 is studied for its ability to stimulate the release of growth hormone (GH) and insulin-like growth factor 1 (IGF-1) without significantly affecting cortisol levels.

Frequently Asked Questions

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Backed by Research

Published Study Findings on MK-677 (Ibutamoren)

Detailed Research & Citations

In-depth findings from peer-reviewed preclinical and clinical studies

MK-677 (Ibutamoren) is an orally active, non-peptide growth hormone secretagogue that mimics the GH-stimulating action of the endogenous hormone ghrelin. It has been studied for its ability to increase lean body mass and bone mineral density.

GH/IGF-1 Axis

Sustained Elevation of GH and IGF-1

MK-677 potently stimulates the ghrelin receptor, leading to a sustained, dose-dependent increase in serum levels of growth hormone (GH) and insulin-like growth factor 1 (IGF-1) without significantly altering cortisol or prolactin levels.

Journal of Clinical Endocrinology & Metabolism (1998)
Body Composition

Increase in Lean Body Mass

In clinical studies involving healthy older adults, once-daily administration of MK-677 over 12 months resulted in significant increases in lean body mass, likely driven by enhanced GH and IGF-1 signaling.

Annals of Internal Medicine (2008)
Bone Health

Bone Turnover and Mineral Density

MK-677 administration increased markers of bone turnover in several studies, suggesting potential long-term benefits for bone mineral density and skeletal health in populations susceptible to bone loss.

Neuroendocrinology (1997)
View All 3 Sources
  1. Two-Month Treatment of Obese Subjects with the Oral Growth Hormone (GH) Secretagogue MK-677 Increases GH Secretion, Fat-Free Mass, and Energy ExpenditureSvensson J, et al.Journal of Clinical Endocrinology & Metabolism (1998)
  2. Effects of an Oral Growth Hormone Secretagogue in Older AdultsMurphy MG, et al.Annals of Internal Medicine (2008)
  3. Prolonged oral treatment with MK-677, a novel growth hormone secretagogue, improves sleep quality in manCopinschi G, et al.Neuroendocrinology (1997)
Research Use Only

All findings above are sourced from peer-reviewed journals for educational reference. This product is for research purposes only — not for human consumption. Preclinical results may not translate to human outcomes.

Chemical Identity

Molecular FormulaC27H36N4O5S
Molecular Weight528.67 g/mol
CAS Number159752-10-0
ReferencePubChem ↗

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Research Use Only

All products are for research and laboratory purposes only. Not intended for human or animal consumption. Only qualified professionals should handle these products.