HGH (Human Growth Hormone) vs MK-677 (Ibutamoren)
Dosing, half-life, mechanism, benefits, and safety — side by side.
HGH (Human Growth Hormone)
FDA ApprovedHuman Growth Hormone (HGH, Somatropin) is a 191-amino acid single-chain polypeptide naturally produced by somatotroph cells in the anterior pituitary gland. HGH stimulates growth, cell reproduction, and regeneration thro
Half-Life
2-3 hours
Route
SC/IM
Dose
Medical use: 0.15-0.3mg daily | Research protocols: 1-4 IU daily depending on goals
MW
22 Da
MK-677 (Ibutamoren)
ResearchOral growth hormone secretagogue mimicking ghrelin
Half-Life
~24 hours
Route
Oral
Dose
10-25 mg Daily
MW
528.67 Da
Quick Reference
| HGH (Human Growth Hormone) | MK-677 (Ibutamoren) | |
|---|---|---|
| Category | N/A | N/A |
| Route | SC/IM | Oral |
| Typical Dose | Medical use: 0.15-0.3mg daily | Research protocols: 1-4 IU daily depending on goals | 10-25 mg Daily |
| Frequency | daily | Daily |
| FDA Approved | Yes | No |
| WADA Status | Banned | Banned |
⏱ Pharmacokinetics
| HGH (Human Growth Hormone) | MK-677 (Ibutamoren) | |
|---|---|---|
| Half-Life | 2-3 hours | ~24 hours |
| Research Status | N/A | Research compound - Growth hormone secretagogue |
| CAS Number | N/A | 159634-47-6 |
Molecular
| HGH (Human Growth Hormone) | MK-677 (Ibutamoren) | |
|---|---|---|
| Molecular Weight | 22 | 528.67 |
| Molecular Formula | C13H11N5O3 | C28H40N4O5S |
| Sequence Length | 217 aa | N/A |
| Mechanism | Directly stimulates protein synthesis, lipolysis, and gluconeogenesis through IGF-1 mediated pathways | Oral ghrelin mimetic and GH secretagogue |
Key Benefits
| HGH (Human Growth Hormone) | MK-677 (Ibutamoren) | |
|---|---|---|
| Benefits | Increased muscle mass; Reduced body fat; Enhanced bone density; Improved exercise capacity; Anti-aging effects; Better sleep quality | Muscle growth; Improved sleep quality; Bone density; Growth hormone elevation; Enhanced recovery; Increased appetite; Catabolism Reversal: Nitrogen balance +0.31 vs -1.48 g/day; Fat-Free Mass: Significant increase in obese subjects |
Safety & Warnings
| HGH (Human Growth Hormone) | MK-677 (Ibutamoren) | |
|---|---|---|
| Safety Note | FDA approved for GHD, Turner syndrome, CKD, PWS, HIV wasting, ISS. 🛑 WADA BANNED. Requires medical supervision. Side effects include arthralgia, edema, carpal tunnel, glucose intolerance. | Research compound only. Not approved for human use. |
| Side Effects | Joint pain; Edema; Carpal tunnel; Insulin resistance; Rare diabetes or tumor promotion; Mild-Moderate side effect; Mild-Moderate side effect; Moderate side effect | Glucose elevation; Insulin resistance; Transient edema; Lethargy; Water retention; Elevated blood sugar; Mild side effect; Mild-Moderate side effect |
| Athlete Warning | 🛑 WADA BANNED - Strictly prohibited in competitive sports at all times | 🛑 WADA BANNED - Prohibited in competitive sports as growth hormone secretagogue |
Which should you choose?
HGH (Human Growth Hormone) has FDA-approved status while MK-677 (Ibutamoren) remains a research compound — relevant if regulatory standing matters to you. MK-677 (Ibutamoren) has a longer half-life (~~24 hours) than HGH (Human Growth Hormone) (~2-3 hours), which can mean less frequent dosing.
HGH (Human Growth Hormone) vs MK-677 (Ibutamoren) — FAQ
Which has a longer half-life: HGH (Human Growth Hormone) or MK-677 (Ibutamoren)?
HGH (Human Growth Hormone) has a half-life of ~2-3 hours while MK-677 (Ibutamoren) has a half-life of ~~24 hours. A longer half-life generally means less frequent dosing and more stable levels.
Is HGH (Human Growth Hormone) or MK-677 (Ibutamoren) FDA approved?
HGH (Human Growth Hormone) is FDA approved, while MK-677 (Ibutamoren) is a research compound without FDA approval. Always research regulatory status in your jurisdiction.
Can I stack HGH (Human Growth Hormone) and MK-677 (Ibutamoren) together?
Whether HGH (Human Growth Hormone) and MK-677 (Ibutamoren) can be stacked depends on their mechanisms and receptor targets. Use the stack compatibility checker to analyze synergies and conflicts before combining any peptides.
Which is better: HGH (Human Growth Hormone) or MK-677 (Ibutamoren)?
There is no universal "better" peptide — it depends on your goal. HGH (Human Growth Hormone) is Directly stimulates protein synthesis, lipolysis, and gluconeogenesis through IGF-1 mediated pathways. MK-677 (Ibutamoren) is Oral ghrelin mimetic and GH secretagogue. Choose based on your primary goal and research profile.
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