sarms
Growth - MK677
25mg / ml
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About this product
MK-677 (Ibutamoren): Growth Hormone Secretagogue for Endocrine and Muscle Research
MK-677, also known as Ibutamoren, is a synthetic non-peptide compound classified as a growth hormone secretagogue rather than a true SARM. It is widely studied for its ability to stimulate endogenous growth hormone (GH) and insulin-like growth factor-1 (IGF-1) secretion through activation of the ghrelin receptor (GHS-R1a). Unlike anabolic agents that directly interact with androgen receptors, MK-677 enhances the body’s own hormonal output, making it a compound of interest in research related to muscle maintenance, bone density, sleep regulation, and age-related hormonal decline.
By mimicking the action of ghrelin, MK-677 promotes pulsatile GH release from the pituitary gland while preserving normal circadian patterns of hormone secretion. This mechanism has positioned MK-677 as a reference compound in endocrine research examining growth hormone dynamics without direct suppression of the hypothalamic–pituitary axis.
Product Summary Table
| Compound Name | MK-677 (Ibutamoren) |
| Compound Class | Growth hormone secretagogue |
| Primary Target | Ghrelin receptor (GHS-R1a) |
| Mechanism of Action | Stimulation of endogenous GH and IGF-1 secretion |
| Biological Focus | Muscle maintenance, bone density, and endocrine regulation |
| Form | Liquid oral research formulation |
| Concentration | 25mg per ml |
| Country of Origin | Australia |
| Standard | Research Grade |
In Vivo Research Findings
MK-677 has been evaluated in both clinical and preclinical research settings, particularly in populations with reduced growth hormone output.
- Sustained increases in growth hormone and IGF-1 levels without suppressing natural secretion rhythms.
- Preservation of lean body mass in ageing and catabolic research models.
- Increased bone mineral density observed in long-term endocrine studies.
- Improved sleep architecture, including increased slow-wave sleep duration.
- Potential neuroendocrine effects linked to ghrelin receptor signalling.
Research Applications of MK-677
- Growth Hormone Deficiency Research.
- Muscle Preservation and Sarcopenia Studies.
- Bone Density and Osteoporosis Research.
- Sleep and Circadian Rhythm Investigation.
- Age-Related Endocrine Decline Models.
Studies and Additional Info
- Clinical studies examining MK-677 and GH/IGF-1 elevation
- Research on ghrelin receptor agonism and endocrine signalling
- Sleep studies evaluating slow-wave sleep enhancement
- Long-term trials assessing bone density outcomes
Disclaimer: MK-677 (Ibutamoren) is supplied strictly for laboratory research purposes. It is not intended for human consumption or therapeutic use.
Frequently Asked Questions
Is MK-677 a SARM?
No. MK-677 is a growth hormone secretagogue and does not interact with androgen receptors.
How does MK-677 increase growth hormone?
It activates the ghrelin receptor, stimulating the pituitary gland to release endogenous GH.
Does MK-677 suppress natural hormone production?
Research indicates it preserves normal GH pulsatility rather than suppressing endogenous output.
Is MK-677 anabolic?
It is not directly anabolic but may support lean mass maintenance through elevated GH and IGF-1.
Is MK-677 approved for human use?
No. This compound is supplied strictly for laboratory research purposes.
