CJC-1295 is a synthetic analogue of growth hormone-releasing hormone (GHRH) — the hypothalamic peptide that stimulates HGH secretion from the pituitary. Unlike compounds that directly provide exogenous HGH, CJC-1295 works upstream, stimulating the pituitary’s own HGH production. This distinction has significant implications for the physiological pattern of HGH release and has made CJC-1295 a notable tool in growth hormone axis research.