GHRH vs GHRP Signaling Mechanisms
In scientific endocrinology, growth hormone secretagogues are divided into two main classes: Growth Hormone-Releasing Hormone (GHRH) analogs and Growth Hormone Releasing Peptides (GHRPs). Tesamorelin and Ipamorelin represent the leaders of these respective classes.
Tesamorelin mimics natural GHRH, binding to GHRH receptors on pituitary cells to stimulate growth hormone production. Ipamorelin is a ghrelin receptor agonist (GHRP), which triggers the release of growth hormone by blocking somatostatin (a hormone that inhibits GH).
Research Focus: Visceral Fat vs Systemic Recovery
Tesamorelin is FDA-approved for reducing excess abdominal fat in HIV-associated lipodystrophy. In research, it is highly valued for its ability to target visceral adipose tissue (VAT) – the dangerous fat surrounding internal organs – while leaving subcutaneous fat intact.
Ipamorelin, on the other hand, is a versatile recovery peptide. Because it does not stimulate ghrelin-induced hunger spikes or impact cortisol and prolactin, it is preferred for studies investigating muscle wasting, bone density improvement, and wound healing.
Sourcing and Stacking Protocols
Many researchers study these peptides in stacking protocols (such as GHRH + GHRP stacks) to maximize growth hormone pulses. A common stacking protocol combines CJC-1295 (a GHRH) with Ipamorelin.
When sourcing Tesamorelin (typically 10mg vials) or Ipamorelin (typically 5mg or 10mg vials), ensuring HPLC purity is essential. Audited suppliers like Amino Club offer verified batches, and code MINUS20 provides a flat 20% discount at checkout.