Growth hormone secretagogue peptides

About this category

What researchers select for here is pulse shape, not potency alone. Short-acting secretagogues produce a sharp, physiological pulse; modified analogues with a longer plasma residence flatten that curve. Selectivity matters too — some older compounds also stimulate cortisol and prolactin, which confounds readouts in endocrine models.

All secretagogue kits ship lyophilised with a lot-specific certificate of analysis. Purity is reported as HPLC main-peak percentage and cross-checked against the expected molecular weight by mass spectrometry.

• ·GHRH analogues and GHS-R1a agonists in one catalogue
• ·Selectivity and half-life notes on every product page
• ·Batch COA cross-referenced to the vial cap number
• ·Free 20-minute scientific consultation before ordering

Pulse design: what separates the secretagogue families

Published secretagogue work distinguishes sharply between pulse shape and total exposure. Short-acting ghrelin-receptor agonists produce a discrete, physiological pulse that mirrors endogenous release timing, which is why they dominate protocols that need defined windows. Modified analogues with extended plasma residence trade that precision for convenience, and the reference literature discusses the trade-off openly rather than ranking one as universally better.

Selectivity is the other axis. Older secretagogue generations are documented to stimulate cortisol and prolactin alongside growth hormone pathways — a confound in endocrine readouts. The selective compounds avoid it, and each product page in this category states what the reference literature reports for that specific sequence rather than making a blanket claim for the class.

The classic pairing design, and how it is documented

Combining one GHRH analogue with one ghrelin-receptor agonist is the best-documented design in this category, because the two pathways act on different receptors of the same somatotroph population and amplify rather than compete. Comparison pages for the most-studied pairs set out where the documented behaviour differs, so a research design can be built on data instead of forum convention.

As with the rest of the catalogue, kits ship lyophilised with the batch certificate bundled, and the reconstitution calculator handles the diluent arithmetic for either component of a pairing.

Frequently asked questions