HGH Fragment 176-191 vs Ipamorelin
A detailed comparison to help you understand the differences and choose the right peptide for your research goals.
HGH Fragment 176-191
HGH Fragment 176-191 is the fat-reducing portion of the growth hormone molecule. Unlike AOD-9604 (which has an additional tyrosine), this is the exact fragment of HGH responsible for lipolytic effects.
Full details →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 →Side-by-Side Comparison
| Aspect | HGH Fragment 176-191 | Ipamorelin |
|---|---|---|
| Dose Range | 250 mcg–500 mcg | 100 mcg–300 mcg |
| Frequency | 2x daily | 2x daily |
| Cycle Length | 12–16 weeks | 8–12 weeks |
| Route | subcutaneous | subcutaneous |
| Mechanism | Mimics the lipolytic region of growth hormone, stimulating fat breakdown and inhibiting lipogenesis without affecting blood sugar or promoting growth. Works independently of GH receptors. | 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. |
| Typical Dosage | Typical dosing: 250-500mcg daily, often split into 2-3 doses. Usually administered on empty stomach, often with fasted cardio. | Typical dosing ranges from 200-300mcg administered 2-3 times daily, often combined with CJC-1295. |
| Administration | Subcutaneous injection. Best results when used fasted and combined with exercise. Avoid eating for 30 minutes post-injection. | Subcutaneous injection. Best results when administered fasted or before sleep. Often stacked with GHRH peptides. |
| Side Effects | Generally well-tolerated. May cause injection site irritation, temporary lethargy, or headache. Does not affect blood glucose significantly. | Generally well-tolerated. May cause mild headaches, lightheadedness, or increased hunger initially. |
| Best For |
What They Have in Common
HGH Fragment 176-191, Ipamorelin are both commonly used for:
Key Differences
Unique to Ipamorelin:
Which Has Stronger Evidence?
- Fat Loss: Ipamorelin has stronger research support.
| Goal | HGH Fragment 176-191 | Ipamorelin |
|---|---|---|
| Fat Loss | medium | high |
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
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