DSIP vs Epitalon
DSIP (Endogenous neuropeptide (Delta Sleep-Inducing Peptide, nonapeptide)) and Epitalon (Synthetic tetrapeptide (pineal bioregulator)) are documented as co-studied in the PeptiDex library. This page puts the two entries side by side on class, molecular weight, half-life, origin, mechanism and studied research areas — every value taken from the entry it belongs to.
Why these two are co-studied
Cross-referenced for research context — not a usage or combination recommendation.
At a glance
| Attribute | DSIP | Epitalon |
|---|---|---|
| Compound class | Endogenous neuropeptide (Delta Sleep-Inducing Peptide, nonapeptide) | Synthetic tetrapeptide (pineal bioregulator) |
| Research category | Cognitive & Nootropic | Longevity & Cellular |
| Length (amino acids) | 9 amino acids | 4 amino acids |
| Molecular weight | 848.8 g/mol | 390.35 g/mol |
| Half-life | ~7 minutes (serum) | Not documented |
| Origin | Delta Sleep-Inducing Peptide (DSIP) was originally isolated in the 1970s from the cerebral venous blood of rabbits during induced sleep by researchers in Switzerland. It is a naturally occurring neuropeptide. | Epitalon (also spelled Epithalon) is a synthetic tetrapeptide developed in Russia by Vladimir Khavinson and colleagues, designed as a short-peptide analog derived from studies of the pineal extract Epithalamin. It emerged from Russian peptide bioregulator research aimed at tissue-specific regulatory peptides. |
“Not documented” means the PeptiDex entry records no value for that field. Nothing on this page is estimated, and no figure is carried over from one compound to the other.
How DSIP works
DSIP is a neuropeptide historically associated with the promotion of delta-wave (slow-wave) sleep, though its exact receptor and mechanism of action remain poorly defined. Research has explored roles in stress modulation, neuroendocrine regulation, and antioxidant effects. Findings across studies have been inconsistent, and its physiological function is still not fully understood.
How Epitalon works
Epitalon is proposed to act as a peptide bioregulator influencing gene expression and pineal function. Reported preclinical mechanisms include modulation of the pineal gland and melatonin regulation, and studies have described effects on telomerase activity and telomere length in cultured human cells. The precise molecular mechanism in vivo is not fully established, and much of the mechanistic data comes from cell-culture and animal models.
Mechanistic descriptions reflect published research-literature understanding and are quoted from each compound's own entry. Much peptide research is preclinical (in-vitro or animal-model); mechanism in humans may differ and is not established for many compounds.
Where each one appears in the literature
The research contexts each entry documents. Listing a research area is not a claim of efficacy or a therapeutic indication, and the two lists are not scored against each other.
DSIP
Epitalon
What sets each apart
DSIP
DSIP is a naturally occurring sleep-associated neuropeptide with an undefined mechanism, distinguishing it from the cognition-focused synthetic peptides in this class.
Epitalon
Epitalon is a defined 4-amino-acid pineal bioregulator peptide, distinct from thymic peptides (immune focus) and mitochondrial peptides, with a research emphasis on telomere/telomerase biology.
Frequently asked questions
What is DSIP (delta sleep-inducing peptide)?
DSIP is a nine-amino-acid neuropeptide first isolated in the 1970s and named for its association with delta-wave sleep in early animal experiments. It is studied for possible roles in sleep regulation, stress response, and neuroendocrine modulation, though its precise mechanism remains incompletely defined.
What is DSIP studied for beyond sleep?
In addition to sleep research, DSIP has been examined in models involving stress, pain, thermoregulation, and neuroendocrine function, reflecting a broad and not fully explained profile. Reviews describe it as a multifunctional peptide, which is part of why its mechanism is still debated.
What does DSIP's short half-life imply for research design?
DSIP is reported to have a serum half-life on the order of only several minutes and limited in vitro stability. This short exposure, combined with the observation that effects may involve carrier-protein complexes or precursor forms, is an important consideration when timing sleep-related endpoints in studies.
What is epitalon and what is it studied for?
Epitalon (epithalon) is a synthetic tetrapeptide, Ala-Glu-Asp-Gly, modeled on the pineal peptide epithalamin. It is studied in aging research for reported effects on telomerase activity, telomere length, circadian/melatonin regulation, and antioxidant markers, largely in older Russian experimental programs and cell/animal models.
What is the sequence and molecular weight of epitalon?
Epitalon is the tetrapeptide Ala-Glu-Asp-Gly (AEDG), with molecular formula C14H22N4O9 and a molecular weight of about 390.35 g/mol. Its short four-residue length is one reason it is thought to have a very brief systemic half-life.
How is epitalon cycled in research protocols?
Reported research and community protocols use short cycles rather than continuous dosing, commonly a 10-20 day course repeated once or twice per year. Cycling reflects the older Russian research design of intermittent short courses rather than daily long-term administration.
Answers are the ones published on each compound's own PeptiDex entry. They are educational summaries of research-literature context and are not medical advice.