MK-677 (Ibutamoren)

Oral ghrelin mimetic that drives GH and IGF-1 release — not a peptide, but a potent oral GH secretagogue.

VIAL IMAGE NEEDED

What It Is

MK-677 (Ibutamoren) is an oral ghrelin receptor agonist — not a peptide. It mimics the hunger hormone ghrelin to drive growth hormone and IGF-1 release without injections. It is one of the most accessible GH secretagogues but comes with significant appetite and metabolic side effects that must be managed.

Mechanism of Action

MK-677 mimics the ghrelin hunger signal by binding to the ghrelin receptor (GHS-R1a), stimulating the pituitary to release growth hormone and elevating IGF-1 levels. Unlike injectable peptides, it is orally bioavailable with a long duration of action, producing sustained GH elevation over 24 hours from a single dose.

Key Benefits

Oral administration — no injections

Sustained GH and IGF-1 elevation

Improved sleep quality

Enhanced recovery

Rapid onset (1–2 weeks)

Dosing Protocol

Tier	Dose	Frequency	Notes
Starting	10 mg	Nightly	Begin here to assess tolerance
Moderate	15–20 mg	Nightly	Standard protocol dose
High	25 mg	Nightly	Advanced — monitor glucose closely

Route: ORAL

Timing: Nightly (before bed)

Onset: Effects noticeable within 1–2 weeks

Recommended Stacks

CJC-1295 / Ipamorelin — for stronger GH output (injectable + oral synergy)
Berberine or GDA (Glucose Disposal Agent) — to manage blood sugar elevation
Electrolytes + Magnesium — supports sleep and reduces water retention effects
High protein diet — minimum bodyweight x 1 g/day

Safety & Side Effects

Blood Sugar Warning: MK-677 CAN RAISE BLOOD SUGAR. Run Berberine or a Glucose Disposal Agent (GDA) alongside to mitigate this risk. Monitor fasting glucose regularly.

Other side effects:

Significant appetite spikes — can derail cutting phases
Water retention and bloating
Carpal-tunnel tingling and joint stiffness
Vivid dreams
Can raise prolactin levels

NOT for cutting phases. The appetite increase and water retention make MK-677 unsuitable for fat loss protocols. Use during lean bulking or maintenance phases only.