Growth Hormone Secretagogues: Ipamorelin vs Sermorelin

Growth hormone (GH) plays a vital role in body composition, recovery, and metabolic health. As we age, GH secretion naturally declines. Peptides like Ipamorelin and Sermorelin offer different approaches to supporting the body's natural GH production. ## Sermorelin: The GHRH Analog Sermorelin is a synthetic version of growth hormone-releasing hormone (GHRH). It binds to GHRH receptors in the pituitary gland, stimulating the natural pulsatile release of growth hormone. **Key characteristics:** - Works through natural feedback loops - Shorter half-life requiring more frequent dosing - Preserves physiologic GH patterns - Dependent on pituitary responsiveness ## Ipamorelin: The Selective Ghrelin Mimetic Ipamorelin activates ghrelin receptors (GHS-R) to trigger GH release. Unlike other ghrelin mimetics, it's highly selective—meaning fewer side effects related to appetite and cortisol. **Key characteristics:** - Minimal impact on cortisol and prolactin - More consistent GH release - Often combined with CJC-1295 for synergy - Clean release profile ## Choosing Between Them The choice often depends on individual goals and physiology: - **Sermorelin** may be preferred for those wanting to work purely through GHRH pathways - **Ipamorelin** (especially with CJC-1295) offers a stronger, more predictable response Both require a prescription and should be used under physician supervision.