GH secretagogues: the research field mapped.

Two doors into the same gland

Growth hormone is released by the pituitary in pulses, and secretagogue research is the study of compounds that stimulate those pulses rather than replacing the hormone from outside. The field splits cleanly by receptor. The first family, GHRH analogs, mimics growth hormone releasing hormone, the hypothalamic signal that tells the pituitary to release. Sermorelin is the original short-acting analog; CJC-1295 is the modified successor engineered for a longer half-life. Their literature centers on pulse amplitude: how much each release delivers.

The second family works the ghrelin receptor, a separate input to the same gland. Early ghrelin-mimetic peptides established the pathway but carried off-target baggage in the literature: appetite stimulation and effects on other hormones. Ipamorelin is the refinement, studied as a selective agonist that triggers GH pulses with less of that noise, which is why it displaced its predecessors in modern research designs.

Why protocols pair one of each

The pairing logic comes straight from the physiology. The two receptor families converge on the same secretory machinery through different mechanisms, and the literature describes their combined effect on GH release as synergistic: the pulse produced by both together exceeds the sum of either alone. A GHRH analog raises the amplitude of the release; a ghrelin mimetic amplifies and reinforces the pulse through its own receptor.

Just as important is what the approach preserves. Because secretagogues work through the body's own release machinery, the pulsatile pattern of GH secretion is maintained, along with its feedback loops. That pulsatility is a defining feature of natural GH physiology, and studying compounds that preserve it is a different research question from studying continuous exogenous exposure. This is the core reason the secretagogue field exists as its own branch of GH research.

The catalogue option

The pairing is standard enough that the two compounds ship together: CJC-1295/Ipamorelin comes co-lyophilized in a single vial, 5mg of each, so one reconstitution yields the blend at a fixed ratio. The vial lists at ₱1,900, or ₱1,710 on a first order, in stock with same-day Metro Manila dispatch. How the blend stacks up against the older GHRH analog is covered in the sermorelin comparison.

Like every lyophilized compound, the blend needs bacteriostatic water for laboratory preparation, sold separately at ₱250. When stock lands, it ships from Metro Manila cold storage, same-day across the metro on verified orders before noon, batch number printed on every label.

Supplied for laboratory research use only. Not for human consumption. Nothing on this page is medical advice.