DSIP
Also known as Delta Sleep-Inducing Peptide
DSIP, delta sleep-inducing peptide, is a nine-amino-acid peptide first isolated in 1977 from the blood of rabbits in induced sleep. Decades of work have not pinned down its receptor or a consistent effect on human sleep. It is not an approved medicine anywhere.
Who has DSIP in stock
| Supplier | Listing | Price | Per mg | |
|---|---|---|---|---|
| XL PeptidesBest valueUK | DSIP 10mg Research Peptide | £17.99 | £1.80 | In stock, go |
| Peptides UKUK | DSIP 5mg | £14.95 | £2.99 | In stock, go |
| AminoPeptidesUK | DSIP Peptide | 5mg & 10mg | £15.00 | £3.00 | In stock, go |
| Baltic PeptidesEU and UK | DSIP (Delta Sleep Inducing Peptide) 5mg | €34.99 | €7.00 | In stock, go |
| Certa PeptidesEU and UK | DSIP | €14.49 | – | In stock, go |
| HiPeptidesUK | DSIP | £29.99 | – | In stock, go |
| HiPeptidesUK | DSIP Nasal Spray | £39.99 | – | In stock, go |
| PEAK_PEPTIDEInternational | DSIP | €49.90 | – | In stock, go |
| True PeptidesInternational | DSIP | US$55.00 | – | In stock, go |
| 99 Purity PeptidesUS | DSIP Spray | US$64.99 | – | In stock, go |
Live stock is checked hourly at 10 suppliers. A further 7 vetted suppliers have no live feed yet, so we never show them as in stock. We earn a commission from some supplier links when you buy. It costs you nothing extra and never changes the order, which is by price per mg.
What it has been studied for
- Sleep patterns in rabbits and rats
- Insomnia in small human studies in the 1980s, with mixed results
- Withdrawal symptoms in small, uncontrolled studies
Evidence level: Early human data. Human data exists, but read the details above before assuming it applies to you.
What happened in human trials
Small 1980s sleep studies gave mixed results. Headache and nausea were reported. No modern trials.
Prohibited in drug-tested sport under the World Anti-Doping Code.
UK legal status
Not licensed as a medicine in the UK. Sold as a research chemical only.
Handling
Supplied as a lyophilised powder. Reconstituted with bacteriostatic water and refrigerated once mixed. Commonly 5mg per vial.
Questions
Does DSIP actually help sleep?
The human studies are old, small and inconsistent. Some reported better sleep efficiency, others found no difference from placebo.
Before you buy anything, run the four-question check for red flags that apply to you.