Not yet available, we are working hard on this format.
View the pre-filled pensThe mechanism
A field that stopped growing
Delta sleep-inducing peptide was isolated from rabbit brain tissue in the 1970s and named after the sleep stage the original researchers associated with it. The name has proved durable; the evidence base less so. Subsequent work has been sporadic, and independent replication is limited.
What the papers actually examine is interaction with sleep architecture in animal models, alongside some work on stress response. Whether any of it translates is an open question that the literature has not closed in either direction.
We could pad this page out. We would rather it stayed short and accurate, because a long page about a thin literature is its own kind of claim.
Anyone looking for peptides for sleep will find far more written about the subject than the literature can carry, and nearly all of it traces back to one molecule named half a century ago. That is the field as it stands. Assembling a longer area page from compounds whose link to sleep research is an assertion rather than a paper would be easy enough, and it is the reason several sequences that sit in the cognition area are not repeated here.
What is being investigated- Sleep architecture in animal models
- Interaction with stress-response signalling
- Why replication has been limited since the 1970s
- Chain length and the nasal route
Where this sits legally
DSIP holds no approval anywhere and is not a medicine in any jurisdiction. It is research material, and that is the whole of its legal status.
In this area
Compounds studied for sleep
One item, because one is what the literature supports.
In depth
The original isolation, and what followed it
The original isolation was done in animal tissue and the name was chosen for the sleep stage the researchers of the day associated with the fraction they had found. Work that followed looked at sleep architecture in animal models and, separately, at markers of the stress response, with the two lines rarely joined up. Little of it has been repeated by groups outside the original tradition, and a literature that stays small for decades is neither refuted nor confirmed; it is simply unfinished. The record is short enough to read for yourself through a PubMed search on delta sleep-inducing peptide.
Because the science is thin, the useful checks in this area are about the material rather than the claims. A nonapeptide is short enough for a mucosal format to be a serious research question, and the comparison of the two routes explains what that format settles and what it does not. A thin literature also attracts confident marketing, so the list of supplier red flags is a practical companion to this page: where evidence is scarce, the quality of the paperwork is most of what is left to judge.
Where we stop
What the sleep page leaves out
A page about one compound with a thin literature should be short, and this one is. We are not going to pad it with adjacent research to make the area look better supported than it is, and there is nothing here about what the compound does to sleep in a person.
Background reading
The sleep reading list, before you order
Short reading list for a short field, plus the storage notes that apply to any spray.
Compound
DSIP
A nonapeptide isolated from rabbit brain in the 1970s, and why the field around it stayed small.
Read PracticeStorage and shelf life
A single-product area still needs the same care with temperature, light and dating the label.
Read FormatNasal sprays
Metered delivery without sharps, and why only short sequences appear in this format.
Read FrameworkResearch use only
What the label permits and forbids, and where the responsibility sits.
ReadFrequently asked
Questions about sleep research
Mainly about why this area is so much smaller than the rest.