The Hunger Signal

GHRP-6 (Growth Hormone Releasing Peptide-6) was the first synthetic hexapeptide designed to release GH. It works by mimicking Ghrelin, the “hunger hormone.”

This dual action is its key feature: it releases Growth Hormone (for repair and muscle growth) AND massively stimulates appetite by activating cholinergic receptors in the stomach. This makes GHRP-6 valuable for individuals struggling to eat enough calories for mass gain or recovering from cachexia (muscle wasting conditions).

Scientific References

  • Bowers CY, et al. “On the in vitro release of GH by a synthetic hexapeptide.” Endocrinology. 1984.
  • Laferrère B, et al. “Growth hormone releasing peptide-2 (GHRP-2), like ghrelin, increases food intake in healthy men.” Journal of Clinical Endocrinology & Metabolism. 2005.