Weight
MK-677
Growth
2
Amino acids
Molecular weight
Peptide
Type
Oral compound activating ghrelin receptors to trigger growth hormone release while preserving natural production. Achieves superior oral bioavailability exceeding 60% with a 24-hour half-life, making it unique among GH secretagogues for its convenient once-daily oral dosing.
Top researched benefits
Overview of MK-677
Selectively binds GHS-R1a receptors in hypothalamus and pituitary, triggering pulsatile growth hormone release while maintaining natural circadian patterns.
Growth Hormone
- Restores youthful growth hormone levels in elderly subjects with 97% increase in 24-hour secretion.
- Sustained 40-72% IGF-1 elevation over extended periods.
- 20% REM increase in younger adults; 50% improvement in elderly.
Body Composition
- Demonstrates +2.69g/day nitrogen retention versus -8.97g/day placebo, protecting lean mass during caloric restriction.
- Increases fat-free mass with preferential lean tissue accrual.
- 15% basal metabolic rate elevation documented at 2 weeks.
Bone Health
- 39-45% increase in bone formation markers within 6-8 weeks.
Storage
Room temperature in cool, dry place; no refrigeration required
Frequency
Once daily, preferably at bedtime on empty stomach
Typical Dose
Start 12.5mg daily, increase to 25mg based on tolerance
Cycle Duration
8-12 weeks for body composition goals
Chemical Makeup
Key benefits
97% increase in 24-hour growth hormone secretion
40-72% elevation in IGF-1 levels
Enhanced sleep quality with improved REM patterns
Preferential lean tissue gains of 1.1-2.7kg over 8-12 months
15% basal metabolic rate increase within 2 weeks
Oral administration (no injections required)
Community interest
This peptide is still gaining traction in the community.
Ghrelin Receptor Agonist | Oral Growth Hormone Secretagogue
This overview is informational and based on aggregated descriptions from studies and user reports.
Was it helpful?YesMK-677 Molecular Information
View the scientifc details of MK-677.
2
Amino Acids
MK-677
?
?
Position 1
?
?
Position 2
Molecular Weight
528.7DaChain Length
2Amino AcidsType
PeptideMK-677 Protocols
Optimal bioavailability eliminates injection requirements with convenient daily dosing. Take at bedtime on empty stomach for best results.
| Goal | Dosage | Frequency | Route |
|---|---|---|---|
| Body composition/anti-aging | 25 | 1 week range | Oral (bedtime, empty stomach) |
| Sleep quality improvement | 25 | 1 week range | Oral (30 minutes before bed) |
| Conservative initiation | 12.5 | 1 week range | Oral (assess tolerance) |
MK-677 Cycle
The MK-677 Cycle section explains how long a typical cycle lasts and what to expect during each phase. Over time, your body can become less responsive with continuous use.
Taking breaks between cycles may help maintain effectiveness and support better overall results.
- Week 1-2
- Improved sleep quality, vivid dreams, possible appetite increase
- Week 2-4
- Enhanced recovery, better sleep architecture, initial body composition changes
- Week 4-8
- Noticeable lean mass gains, continued sleep benefits
- Week 8-12
- Maximum body composition improvements, sustained GH elevation
Dosing tools
MK-677 Peptide Dosage Calculator
Calculate peptide doses with our visual syringe guide.
0.3mL / 30 units
5 units
0.050 mL
1 mL
2 mL
3 mL
5 mL
Custom
Conversion: 1,000 mcg = 1 mg
Injection Results
Based on your vial and dilution inputs.
Safe concentration range
MK-677
SINGLE COMPOUNDVolume per injection
0.05
mL
Concentration
10.00
mg/mL
Doses per vial
20
doses
Total injections per vial
20 injections
How it works
Based on a 10 mg MK-677 vial diluted with 1 mL of bacteriostatic water, each 500 mcg injection equals 0.05 mL.
Research Purposes Only
These calculators are provided for educational and research purposes only. Always verify calculations and consult with qualified professionals. The information provided is not medical advice. Peptides should only be used in accordance with applicable laws and regulations.
Reference Guide
Dosing Cycle
- Peptide
- MK-677
- Dosing
- Start 12.5mg daily, increase to 25mg based on tolerance
- Dosing Frequency
- Once daily, preferably at bedtime on empty stomach
- Cycle Duration
- 8-12 weeks for body composition goals
- Storage
- Room temperature in cool, dry place; no refrigeration required
Note: Triple agonist; microdose for fewer side effects
Reconstitution Tips
- Use bacteriostatic water (BAC) — contains 0.9% benzyl alcohol for preservation
- Inject water slowly — aim down the vial wall, not directly onto powder
- Never shake — gently swirl or roll the vial until dissolved
- Store properly — refrigerate at 2-8°C after reconstitution
- Use within 28 days — most reconstituted peptides remain stable for about 4 weeks
- Keep sterile — always clean vial tops with alcohol before drawing
Peptide Interactions
Research suggestions of MK-677 interactions with other common peptides and substances.
Weight
ghr
Growth
GHRP-2
SYNERGISTIC
MK-677 baseline elevation combines with GHRP-2 pulsatile spikes.
Weight
ipa
Growth
Ipamorelin
SYNERGISTIC
Both stimulate GH release through different mechanisms.
Side effects
Avoid: Do not take MK-677 with HGH.
Contraindications
Heart disease or congestive heart failure
Diabetes or pre-diabetes
Active cancer
Severe cardiovascular disease
Pregnancy or breastfeeding
Stop signs
Shortness of breath, chest pain, or unusual fatigue
Blood glucose levels >100mg/dL or diabetes symptoms
Liver enzyme elevation (ALT/AST >2x upper normal)
Severe fluid retention or unexplained swelling
Any concerning cardiovascular symptoms
Bad signs
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Frequently asked questions
What benefits can peptides offer in research?
Peptides can support cellular repair, immune function, metabolic health, and tissue regeneration. Research suggests they may help with recovery, sleep quality, skin health, and cognitive function, depending on the specific peptide and its mechanism of action.
What are some exciting applications of peptides in modern science?
Current research explores peptides for longevity, muscle recovery, wound healing, metabolic disorders, and neuroprotection. Scientists are also investigating peptide-based drug delivery and targeted therapies that could offer more precise treatment options.
How do peptides influence health and wellness?
Peptides work by binding to receptors on cells and triggering specific biological responses. Depending on the peptide, they may promote growth hormone release, support collagen production, modulate inflammation, or influence neurotransmitter activity—each with different implications for health and wellness.
Where can I find the latest studies on peptide applications?
Peer-reviewed journals such as Nature, Science, and specialized publications like Peptides and the Journal of Peptide Science publish ongoing research. PubMed and Google Scholar are useful for searching studies by peptide name or condition.
Are there any guidelines for using peptides in research?
Research use of peptides typically follows institutional review board (IRB) protocols and regulatory guidelines. Dosage, administration route, and safety monitoring should align with published literature and applicable regulations in your jurisdiction.
What is the difference between peptides and proteins?
Peptides are short chains of amino acids (typically under 50), while proteins are longer chains that fold into complex structures. Peptides are often more stable, easier to synthesize, and can cross cell membranes more readily, making them attractive for therapeutic applications.
How should peptides be stored?
Most peptides require refrigeration (2–8°C) and protection from light. Reconstituted peptides often have shorter stability and may need to be used within days or weeks. Always follow the manufacturer's or research protocol's storage instructions.
Can peptides be taken orally?
Some peptides are bioavailable orally, but many are broken down by digestive enzymes before reaching the bloodstream. Subcutaneous injection, nasal administration, or other routes are often used in research to improve bioavailability. The optimal route depends on the specific peptide.
MK-677Research References
MK-677 is a well studied compound
MK-677
MK-677 is a well studied compound
Growth Hormone Stimulation in Elderly
25mg oral daily for 2 weeks showed 97% increase in 24-hour GH secretion in elderly adults.
1996
Body Composition in Obese Subjects
25mg oral daily for 2 months increased fat-free mass and energy expenditure in obese adults.
1998
Reversal of Diet-Induced Catabolism
25mg oral daily for 7 days showed nitrogen retention of +2.69g/day versus placebo -8.97g/day.
1998
Sleep Quality Improvement Study
25mg oral daily for 1 week showed 20% REM increase in young adults; 50% in elderly.
1997
Bone Turnover Markers Study
25mg oral daily for 2 months showed 39-45% increase in bone formation markers in elderly adults.
1999