MGF (Mechano Growth Factor) vs Tesamorelin
A detailed comparison to help you understand the differences and choose the right peptide for your research goals.
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 →Tesamorelin
Tesamorelin is a synthetic analog of growth hormone-releasing hormone (GHRH). It is FDA-approved under the brand name Egrifta for reducing excess abdominal fat in HIV-infected patients with lipodystrophy.
Full details →Side-by-Side Comparison
| Aspect | MGF (Mechano Growth Factor) | Tesamorelin |
|---|---|---|
| Dose Range | 400 mcg–1.2 mg | 2 mg |
| Frequency | Less than daily | 1x daily |
| Cycle Length | 4–6 weeks | 8–52 weeks |
| Route | intramuscular | subcutaneous |
| Mechanism | Activates muscle satellite cells (stem cells) and promotes their proliferation without differentiation, priming them for fusion with existing muscle fibers during repair and growth. | Stimulates the pituitary gland to produce and release growth hormone by binding to GHRH receptors. Increases IGF-1 levels which promotes lipolysis and reduces visceral adipose tissue. |
| Typical Dosage | Due to extremely short half-life (minutes), typical protocols use 100-200mcg injected directly into target muscles immediately post-workout. | FDA-approved dose: 2mg administered subcutaneously once daily. Research protocols may use various dosing schedules. |
| Administration | Intramuscular injection into trained muscles within minutes of workout completion. Must be used immediately after reconstitution due to instability. | Subcutaneous injection into the abdomen. Rotate injection sites. Best administered at the same time daily, preferably in the evening. |
| Side Effects | Injection site soreness, potential hypoglycemia, localized swelling. Short half-life limits systemic effects. | Common side effects include injection site reactions (erythema, pruritus), joint pain, peripheral edema, and muscle pain. May cause elevated blood glucose. |
| Best For |
What They Have in Common
MGF (Mechano Growth Factor), Tesamorelin are both commonly used for:
Key Differences
Unique to MGF (Mechano Growth Factor):
Unique to Tesamorelin:
Which Has Stronger Evidence?
| Goal | MGF (Mechano Growth Factor) | Tesamorelin |
|---|---|---|
| Muscle Growth | medium | medium |
Key Studies
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
Tesamorelin
- Tesamorelin as an Adjunct to Exercise for Improving Physical Function in HIV (TRIUMPH): a clinical trial protocol.
BMJ open, 2026
- Effects of Tesamorelin on Neurocognitive Impairment in Persons With HIV and Abdominal Obesity.
The Journal of infectious diseases, 2025
- Efficacy and safety of tesamorelin in people with HIV on integrase inhibitors.
AIDS (London, England), 2024
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