Effects of endogenous GLP-1 have been better characterized using the receptor antagonist exendin-(9-39)
BPC-157 appears to be a synthetic pentadecapeptide, TB-500 mirrors the endogenous thymosin beta-4, GHK-Cu is a tripeptide with a copper ion, and KPV represents the C-terminal segment of alpha-melanocyte-stimulating hormone
Think of them as messengers that instruct cells and tissues on specific functions, like how to repair damage or rebalance systems
GI mobility, gastrointestinal mobility
Millions of people have used it since FDA approval, and the side effect profile is well-characterized
Key properties: Stimulates GH release from the pituitary (not the hypothalamus) Does not significantly raise cortisol or prolactin Short half-life (~2 hours) produces a sharp, pulsatile GH release Does not block somatostatin (the hormone that inhibits GH release) Selective for GH minimal effect on other hormones The selectivity is what makes ipamorelin the preferred GHRP for most protocols