MK-677 vs GHRP-6

A comprehensive, data-driven comparison of MK-677 (Ibutamoren) and GHRP-6 (Growth Hormone Releasing Peptide-6). Compare efficacy, side effects, costs, FDA approval status, and clinical evidence to make an informed decision.

MK-677
Phase 2
Growth hormone optimization and muscle growth
Evidence
Moderate
Monthly Cost$50 - $100/mo
DosingDaily
GHRP-6
Not submitted
Growth hormone optimization
Evidence
Emerging
Monthly Cost$35 - $70/mo
DosingDaily

Side-by-Side Comparison

PropertyMK-677
Ibutamoren, Nutrobal
GHRP-6
Growth Hormone Releasing Peptide-6
FDA Status
Phase 2
Not submitted
Category
Growth Hormone
Growth Hormone
Primary Use
Growth hormone optimization and muscle growth
Growth hormone optimization
Weight Loss %
N/A
N/A
Monthly Cost
$50 - $100/mo
$35 - $70/mo
Administration
Oral
Subcutaneous injection
Typical Dose
10-25mg daily
100-300mcg 2-3x daily
Frequency
Daily
Daily
Mechanism

Oral growth hormone secretagogue that mimics ghrelin to stimulate GH and IGF-1 release

First-generation growth hormone secretagogue that stimulates GH release and increases appetite via ghrelin mimicry

Common Side Effects
  • Increased appetite
  • Water retention
  • Fatigue
  • Muscle pain
  • +1 more
  • Significant increase in appetite
  • Water retention
  • Tingling or numbness
  • Fatigue
  • +1 more
Serious Side Effects
  • Insulin resistance
  • Elevated prolactin
  • Potential impact on cancer risk
  • Elevated cortisol
  • Elevated prolactin
  • Insulin resistance
Evidence Quality
Moderate
Emerging
Clinical Trial Phase
Phase 2
N/A

Key Differences

  • 1GHRP-6 is generally more affordable ($35 - $70/mo) compared to MK-677 ($50 - $100/mo).
  • 2MK-677 is administered via oral, while GHRP-6 uses subcutaneous injection.
  • 3MK-677 has moderate-quality evidence, while GHRP-6 has emerging-quality evidence.

Which Is Better For...

GH

GHRP-6

More budget-friendly option with lower monthly costs

MK

MK-677

Stronger clinical evidence base to support its use

Cost Comparison

PeptideMonthly Cost RangeFDA StatusManufacturer
MK-677$50 - $100/mo
Phase 2
Various research labs
GHRP-6$35 - $70/mo
Not submitted
Various research labs

Prices are estimated monthly costs and may vary based on pharmacy, insurance coverage, and manufacturer assistance programs. Costs for non-FDA-approved peptides reflect research compound pricing.

Frequently Asked Questions

What is the main difference between MK-677 and GHRP-6?

MK-677 works via Oral growth hormone secretagogue that mimics ghrelin to stimulate GH and IGF-1. GHRP-6 works via First-generation growth hormone secretagogue that stimulates GH release and increases appetite via. They differ in FDA approval status, efficacy data, and cost.

How much does MK-677 cost compared to GHRP-6?

MK-677 typically costs $50 - $100/mo, while GHRP-6 costs $35 - $70/mo. Prices may vary by pharmacy, insurance coverage, and manufacturer programs.

Are MK-677 and GHRP-6 FDA approved?

MK-677 is not FDA-approved (Phase 2). GHRP-6 is not FDA-approved (Not submitted). FDA approval indicates the treatment has met rigorous safety and efficacy standards.

What are the side effects of MK-677 vs GHRP-6?

Common side effects of MK-677 include Increased appetite, Water retention, Fatigue. Common side effects of GHRP-6 include Significant increase in appetite, Water retention, Tingling or numbness. Always consult a healthcare provider about potential side effects.

Can I switch from MK-677 to GHRP-6?

Switching between peptide therapies should only be done under the guidance of a qualified healthcare provider. They can evaluate your medical history, current response, and determine the safest transition protocol.

Learn More

MK-677 Full Profile
Growth hormone optimization and muscle growth

MK-677 (Ibutamoren) is an orally-active growth hormone secretagogue that mimics the action of ghrelin. Unlike peptide injections, it is taken orally and has a long half-life allowing once-daily dosing...

View Full MK-677 Guide
GHRP-6 Full Profile
Growth hormone optimization

GHRP-6 is a synthetic hexapeptide and one of the first growth hormone releasing peptides developed. It stimulates GH secretion by activating the ghrelin receptor. Unlike later-generation peptides like...

View Full GHRP-6 Guide

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Medical Disclaimer

The information provided on this page is for educational and informational purposes only and does not constitute medical advice. This comparison between MK-677 and GHRP-6 should not be used as a substitute for professional medical guidance. Always consult a qualified healthcare provider before starting, stopping, or modifying any peptide therapy. Clinical data cited may be from ongoing trials and is subject to change. Individual results may vary significantly. PeptideVS does not endorse, recommend, or promote the use of any specific peptide for medical treatment.