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/ comparison

MK-677
vs
Ipamorelin

Side-by-side comparison of mechanism, research, dosing, side effects, and pricing.

peptide

MK-677

Oral ghrelin mimetic. Stimulates GH and IGF-1 release.

Cheapest
$45.66
50mg at Valor Peptides
See MK-677 →
peptide

Ipamorelin

Selective ghrelin receptor agonist. Cleanest GH stimulator for research.

Cheapest
$26.52
5mg at Nano Blue Labs
See Ipamorelin →
/ research scoring

Research base

MK-677
Research Maturity★★★★☆
Evidence Strength★★★★☆

Multiple human trials. Strong GH/IGF-1 elevation data.

Ipamorelin
Research Maturity★★★★☆
Evidence Strength★★★★☆

50+ studies. Best GHS for avoiding side effects. Works well alone or stacked.

/ mechanism

How they work

MK-677

Ghrelin receptor agonist. Active orally — unique among GH-related compounds.

Ipamorelin

Ghrelin receptor (GHSR1a) agonist. Pulsatile GH release without cortisol/prolactin increase.

/ research dosing

Protocols compared

MK-677
Range: 10-25 mg/day (most common: 12.5-25mg/day)
Frequency: Once daily, usually before bed
Route: Oral (capsule or solution)
Oral GH secretagogue (ghrelin mimetic). Causes substantial appetite increase, water retention, and can elevate cortisol. Bedtime dosing common but causes vivid dreams in some. Blood sugar/insulin sensitivity should be monitored.
Ipamorelin
Range: 200-300 mcg/dose, 1-3x daily
Frequency: 1-3x daily; before bed is most common
Route: Subcutaneous on empty stomach
Selective GH secretagogue — no cortisol, prolactin, or appetite increase (unlike GHRP-6/2). Frequently paired with CJC-1295 (no DAC) at matched doses. Bedtime dosing aligns with natural nocturnal GH pulse. Empty stomach (no carbs/protein 2 hours before) maximizes pulse.
/ side effects & timeline

What to expect

MK-677
Side effects

Common: increased appetite, water retention, mild lethargy.

Timeline

2-4 weeks

Ipamorelin
Side effects

Very low side effect profile.

Timeline

4-8 weeks for noticeable effects

/ pricing

Price comparison

MK-677
Lowest price$45.66 (50mg)
Min $/mg$0.91/mg
Avg $/mg$2.98/mg
Max $/mg$5.99/mg
Ipamorelin
Lowest price$26.52 (5mg)
Min $/mg$3.02/mg
Avg $/mg$7.13/mg
Max $/mg$12.28/mg
/ which to pick

The honest verdict

Pick MK-677 if: Effective standalone, especially for those preferring oral administration.

Pick Ipamorelin if: Strong standalone option. Selectivity is key advantage.

Why not both? Some researchers run them together. Check our Interaction Matrix to see if these compounds synergize or work independently.

FOR RESEARCH USE ONLY. Both compounds are intended for laboratory research and not for human consumption.