Ipamorelin vs MGF (Mechano Growth Factor)
A detailed comparison to help you understand the differences and choose the right peptide for your research goals.
Ipamorelin
Ipamorelin is a selective growth hormone secretagogue that stimulates the release of growth hormone from the pituitary gland without significantly affecting cortisol or prolactin.
Full details →MGF (Mechano Growth Factor)
MGF (Mechano Growth Factor) is a splice variant of IGF-1 that is produced locally in muscle tissue in response to mechanical stress. The non-PEGylated form has a very short half-life.
Full details →Side-by-Side Comparison
| Aspect | Ipamorelin | MGF (Mechano Growth Factor) |
|---|---|---|
| Dose Range | 100 mcg–300 mcg | 400 mcg–1.2 mg |
| Frequency | 2x daily | Less than daily |
| Cycle Length | 8–12 weeks | 4–6 weeks |
| Route | subcutaneous | intramuscular |
| Mechanism | Acts as a ghrelin mimetic, binding to the ghrelin receptor (GHS-R) in the pituitary to stimulate GH release. Highly selective with minimal effect on other hormones. | Activates muscle satellite cells (stem cells) and promotes their proliferation without differentiation, priming them for fusion with existing muscle fibers during repair and growth. |
| Typical Dosage | Typical dosing ranges from 200-300mcg administered 2-3 times daily, often combined with CJC-1295. | Due to extremely short half-life (minutes), typical protocols use 100-200mcg injected directly into target muscles immediately post-workout. |
| Administration | Subcutaneous injection. Best results when administered fasted or before sleep. Often stacked with GHRH peptides. | Intramuscular injection into trained muscles within minutes of workout completion. Must be used immediately after reconstitution due to instability. |
| Side Effects | Generally well-tolerated. May cause mild headaches, lightheadedness, or increased hunger initially. | Injection site soreness, potential hypoglycemia, localized swelling. Short half-life limits systemic effects. |
| Best For |
What They Have in Common
Ipamorelin, MGF (Mechano Growth Factor) are both commonly used for:
Key Differences
Unique to Ipamorelin:
Which Has Stronger Evidence?
- Muscle Growth: Ipamorelin has stronger research support.
| Goal | Ipamorelin | MGF (Mechano Growth Factor) |
|---|---|---|
| Muscle Growth | high | medium |
| Recovery & Healing | medium | medium |
Key Studies
Ipamorelin
- The influence of ghrelin agonist ipamorelin acetate on the hypothalamic-pituitary-testicular axis in a cichlid fish, Oreochromis mossambicus.
Animal reproduction science, 2024
- The growth hormone secretagogue receptor 1a agonists, anamorelin and ipamorelin, inhibit cisplatin-induced weight loss in ferrets: Anamorelin also exhibits anti-emetic effects via a central mechanism.
Physiology & behavior, 2024
- Prospective, randomized, controlled, proof-of-concept study of the Ghrelin mimetic ipamorelin for the management of postoperative ileus in bowel resection patients.
International journal of colorectal disease, 2014
MGF (Mechano Growth Factor)
- The role of mechano growth factor in chondrocytes and cartilage defects: a concise review.
Acta biochimica et biophysica Sinica, 2023
- Pretreatment with mechano growth factor E peptide attenuates osteoarthritis through improving cell proliferation and extracellular matrix synthesis in chondrocytes under severe hypoxia.
International immunopharmacology, 2021
- Mechano growth factor interacts with nucleolin to protect against cisplatin-induced neurotoxicity.
Experimental neurology, 2020
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