Ipamorelin vs DSIP

Both surface when people search for peptides and sleep. They arrive at the subject from different ends of the body.

DSIP — delta sleep-inducing peptide — is a nonapeptide first isolated from rabbit cerebral venous blood in the 1970s. The research around it is neuromodulatory and centres on sleep architecture and EEG delta activity. It is old literature, much of it animal, and the mechanism has never been resolved to a single receptor. We state that plainly rather than filling the gap with something more confident.

Ipamorelin reaches sleep indirectly, if at all. It is a selective ghrelin-receptor agonist studied for pulsatile growth-hormone release, and its association with sleep in popular writing rests on the observation that endogenous growth-hormone pulses concentrate in slow-wave sleep. That is a fact about human physiology, not a demonstrated property of this compound.

So the decision is between a compound whose literature is about sleep and one whose literature is about the growth-hormone axis, with a physiological overlap connecting them at a distance.

Both are lyophilised and stored at 2–8 °C. Reconstituted, DSIP holds 30 days refrigerated and ipamorelin 14. Purity, sizes, price per milligram and stock in the table above are read from the live catalogue at page load.

Both are supplied for laboratory research only, and neither is sold for human or veterinary use.