DSIP 10mg

DSIP, delta sleep-inducing peptide, is a synthetic 9-amino-acid peptide first isolated by Schoenenberger and Monnier in 1977 from the cerebral venous blood of rabbits during induced sleep. The naming reflects the original hypothesis that the peptide was a circulating sleep factor, although subsequent research has both reinforced and complicated that interpretation across multiple replication and follow-on studies. DSIP has continued to appear in research literature on sleep-wake regulation, stress-response biology, and circadian neuroendocrinology. This guide explains what DSIP is, the research context with appropriate caveats, and how each batch is independently verified.

DSIP has the amino-acid sequence Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu — nine residues with a free C-terminus. The molecular weight is approximately 849.8 g/mol with the empirical formula C35H48N10O15. It is supplied as a lyophilized white powder for laboratory reconstitution. The single tryptophan residue at the N-terminus is the molecule's primary chromophore and a useful structural marker for quality verification (Trp is detectable by UV absorbance at 280 nm).

DSIP is sold strictly for laboratory and research use. It is not approved by the FDA or any other regulatory body for human or veterinary use, and nothing in this guide constitutes guidance for human administration.

Published research on DSIP spans four decades and several distinct hypotheses. The original Schoenenberger/Monnier work characterized it as a sleep-promoting circulating peptide. Later studies in rodent and primate models reported effects on slow-wave-sleep markers, stress-axis modulation (including ACTH/cortisol response), and circadian-period parameters. The molecule's specific receptor target has not been definitively established — multiple candidate mechanisms appear in the literature, including indirect effects on neurotransmitter systems rather than a single specific receptor. The reproducibility of sleep-related effects across independent laboratories has been inconsistent, which researchers should weigh when designing studies. Primary literature evaluation is recommended.

Every batch of MHS Longevity DSIP is submitted to an independent third-party laboratory before release. The single tryptophan residue makes UV-based quantification straightforward but also flags an oxidation-sensitivity concern that quality verification specifically addresses:

Lyophilized DSIP should be stored at -20°C or below for extended stability. Once reconstituted in bacteriostatic water, the solution is typically held at 2–8°C and used within the documented stability window. The tryptophan residue is sensitive to light and to oxidative conditions — DSIP should be stored protected from light, and reconstituted solutions should not be left in oxygenated conditions longer than necessary. Single-use aliquoting helps preserve tryptophan integrity across a study timeline. Standard aseptic technique applies.