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Comparison

HGH (Somatropin) vs MK-677 (Ibutamoren)

HGH vs MK-677: actual growth hormone vs an oral secretagogue. Legal, mechanism, and risk differences.

№ 021
HGH (Somatropin)
GH-axisEvidence: Strong

HGH is the actual growth hormone protein your pituitary releases — not a peptide that nudges your body to release more. Prescription only in legitimate medicine. Carries the highest legal risk of anything in this space if used non-medically. Most users in this catalog run GH-axis *peptides* (Ipamorelin, CJC, Tesamorelin, Sermorelin) instead, which signal your own body to produce more GH naturally and carry far less regulatory exposure.

Onset
65
Documentation
75
Side intensity
100
Popularity
88
№ 011
MK-677 (Ibutamoren)
GH-axisEvidence: Moderate

MK-677 is the only oral GH-axis compound that actually works. It tricks your body into thinking it's hungry, which signals more GH release. Big appetite increase is the trade-off — great in a bulk, awful in a cut.

Onset
65
Documentation
75
Side intensity
100
Popularity
80
Side-by-side
Field
Left
Right
Category
GH-axis
GH-axis
Half-life
~3-5 hours injected
~24 hours
Route
Subcutaneous
Oral
Schedule
Daily
Once daily
Cycle length
Long-term in medical use
8-12 weeks on, 4 weeks off
Dose
Medical: 1-3 IU daily. Performance use is illegal under federal law in the US (Anabolic Steroid Control Act).
10-25 mg orally, once daily, taken before bed.
FDA
Approved under multiple brand names (Genotropin, Humatrope, Norditropin, Saizen, Omnitrope) for GH deficiency, AIDS wasting, Turner syndrome, short stature in children, idiopathic short stature, SHOX deficiency, and others.
Not FDA approved. Reached Phase 2 trials, never approved.
WADA
Banned (S2)
Banned (S2)
Natty?
Not natty
Not natty
Prescribed
Yes — by endocrinologists for the approved indications. Performance use is illegal under the U.S. Anabolic Steroid Control Act.
Not prescribed in conventional medicine. Sometimes offered by anti-aging clinics off-label.
Top side effects
Water retention / edema; Carpal tunnel symptoms; Insulin resistance / elevated fasting glucose
Aggressive appetite stimulation; Water retention / bloat; Numb/tingling hands (carpal-tunnel-like)

Which one should you pick?

Pick HGH (Somatropin) if people who already have a legitimate medical prescription (gh deficiency, aids wasting, short stature) or educational reference — most users in this space run gh-axis peptides instead.

Pick MK-677 (Ibutamoren) if users who want gh benefits but won't inject or people in a bulking / mass-gain phase.

Full entry
№ 021 HGH (Somatropin) →
Full entry
№ 011 MK-677 (Ibutamoren) →