Skip to main content
Educational comparison - not medical advice. This page compares two compounds for informational purposes. Neither is recommended as treatment. Any protocol decision is a conversation with your licensed healthcare provider.
Home/Peptides/HGH vs MK-677
HEAD-TO-HEAD COMPARISON

HGH vs MK-677

Users comparing injectable HGH vs oral secretagogue approaches.

OPTION A
HGH
Human Growth Hormone (Somatropin)
Exogenous recombinant GH - the direct-injection option vs the pulsatile secretagogue approach.
Full profile →
OPTION B
MK-677
MK-677 (Ibutamoren)
Oral, once-daily growth hormone secretagogue. Technically a small molecule, not a peptide - but lumped into the category for protocol purposes.
Full profile →
THE CORE DIFFERENCE

HGH is direct exogenous recombinant growth hormone - injection required, suppresses natural axis, large predictable IGF-1 response. MK-677 is an oral small molecule that stimulates the ghrelin receptor - no injection, no axis suppression, but appetite increase + water retention + potential insulin sensitivity drift. HGH is a clinical decision with a physician; MK-677 is investigational and typically researched independently.

BEST FOR
Build Muscle →
Each protocol guide pairs the relevant compounds with the supplement stack that supports them and the biomarkers that show whether it’s working.
FEATURE COMPARISON
HGH
MK-677
Full name
Human Growth Hormone (Somatropin)
MK-677 (Ibutamoren)
Category
Growth
Growth
FDA status
FDA-approved for specific pediatric and adult GH-deficiency indications. Off-label use is legally grey.
Not FDA-approved. Investigational; research chemical status.
Half-life
~2–3 hours
~24 hours
Typical dosing
1–4 IU daily (0.33–1.33 mg); optimization dosing typically 1–2 IU
10–25 mg orally, once daily
Route
Subcutaneous
Oral (typically dropper solution or capsule)
Classification
Recombinant 191-amino-acid protein identical to endogenous hGH
Small-molecule ghrelin receptor agonist
BIOMARKERS COMMONLY TRACKED
On HGH
  • • IGF-1
  • • IGFBP-3
  • • Fasting glucose
  • • Fasting insulin
  • • HbA1c
  • • Thyroid panel
  • • Hematocrit
On MK-677
  • • IGF-1
  • • Fasting glucose
  • • Fasting insulin
  • • HbA1c
  • • Prolactin
  • • Cortisol
CALCULATOR
HGH reconstitution →
CALCULATOR
MK-677 reconstitution →
RELATED COMPARISONS
MK-677 vs Tesamorelin
HGH vs Tesamorelin
Whichever you're tracking, we built the dashboard for it.

Log doses, upload labs, watch the biomarkers trend. StackAI reads your panel in context of what you're actually running.

Start tracking free →

Informational comparison only - not medical advice. Research-stage compounds discussed are not FDA-approved unless specifically noted. Any protocol decision should be made with a licensed healthcare provider.