Buy DSIP in the UK
DSIP, delta sleep-inducing peptide, is a nine-residue peptide first isolated in 1977, supplied as a 5mg freeze-dried vial. Research use only.
from £19.991 option
- In UK stock Sent from Britain
- Leaves the same day When ordered before 2pm
- Tracked shipping No charge over £75
- Certificate of analysis Available on request
Prices for DSIP start at £19.99 for the 5mg vial, and all of it is already in British stock at diluents.co.uk rather than sourced to order. It is offered as vial. Order on a weekday before 2pm and the parcel leaves that day, tracked, in a box that gives no clue to its contents.
Because the parcel never leaves the country, nothing has to clear customs, no import charge falls due and nothing is held at a border. Each batch tests at ≥99% by HPLC, and a certificate of analysis for the stock you receive is available on request.
Tracked delivery costs £4.95, or nothing above £75. The ordering steps, one by one.
Other products containing DSIP
Stacks and kits →
Sleep + Recovery Stack
Elsewhere on the Cognitive & Sleep shelf
Whole shelf →
Semax
What is DSIP?
In 1977 this nonapeptide, Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu, was isolated from rabbit cerebral venous blood. It was named delta sleep-inducing peptide for the conditions under which it was found. The name records those circumstances; it does not describe any established mechanism.
Specification
| Residues | 9 |
|---|---|
| Sequence | Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu |
| First isolated | 1977 |
| Purity | ≥99% by HPLC |
| Vial strength | 5mg |
| Form | Freeze-dried (lyophilised) powder |
| Certificate of analysis | Available on request |
Which other products contain it?
Which studies have looked at DSIP?
All of the published work on DSIP is pre-clinical, and no paper listed below is a trial in humans. Grouped by study model, here is what each paper examined:
Literature reviews
- Delta sleep-inducing peptide, Review (PMID 11437870)
- Delta-sleep-inducing peptide (DSIP): a review, Review (PMID 6145137)
- Delta sleep-inducing peptide (DSIP): a still unresolved riddle, Review (PMID 16539679)
Every entry names what a study examined. No entry reports an effect in a person, and nowhere does the site give instructions on how to use anything.
Buying DSIP in the UK: where and how
How does ordering work?
Choose a strength, add it to the basket and go through checkout; no account is needed. An order confirmation comes through at once, and since the site never takes a card, the payment details arrive separately by email.
What difference does UK stock make?
Your DSIP is sent from a warehouse in Britain, so it skips customs, attracts no import charge and loses no days travelling from overseas. A courier collects it the same afternoon if the order is in before 2pm on a working day; the parcel then travels tracked in a plain outer box.
What do you receive?
| Purity | ≥99%, measured by HPLC |
|---|---|
| Labelling | Compound name, strength, format, purity and a research-use statement |
| Certificate of analysis | Available on request for the stock you receive |
| Delivery | UK addresses only, tracked. £4.95, or free over £75 |
| Returns | Within 14 days for sealed, unopened items, see the terms |
DSIP reconstitution
What ships is a dry, freeze-dried cake, and bacteriostatic water is what turns it into a solution. The volume you choose sets how strong that solution ends up. Water only spreads the contents out; it never adds to or takes from the milligrams sealed in the vial.
The figures above are volumes and concentrations of a solution; none of them is a dose, and no guidance on dosing, protocols or administration is given on this site.
The figures open on the 5mg vial with 2ml added, and they update as soon as either control changes. For the syringe-scale conversion, a comparison of the waters and the keeping time of a mixed vial, use the full reconstitution calculator.
| Vial | + 1ml | + 2ml | + 3ml | + 5ml |
|---|---|---|---|---|
| 5mg | 5 mg/ml | 2.5 mg/ml | 1.67 mg/ml | 1 mg/ml |
As a worked case, the 5mg vial with 2ml of bacteriostatic water comes to 2.5 mg/ml, which is simply the label milligrams divided by the millilitres added. Every number in the table is the concentration of a solution, never a dose. Dosage, protocol and administration guidance appear nowhere on this site.
What care does the vial need?
- A chilled vial should warm to room temperature first.
- Before every entry through the stopper, clean it with an alcohol swab.
- Let the water run down the inside wall of the glass; never squirt it onto the cake.
- Roll, never shake: foam means protein has been damaged, and rolling between the fingers avoids it.
- Expect a few minutes before it dissolves fully; a correctly mixed vial ends up clear.
DSIP storage
| Vial, still sealed | Keep it dark, dry and cool; the freezer suits long-term storage best. |
|---|---|
| After mixing | Refrigerate it upright and shaded. A mixed solution should never be frozen. |
What is its shelf life?
| Condition | Typical life |
|---|---|
| Unopened, in a −20 °C freezer | Years. No other condition preserves a lyophilised peptide as well |
| Unopened, in a fridge at 2–8 °C | Months |
| Unopened, at room temperature | Weeks. It copes with the time in transit but should not be kept like this |
| Mixed, in the fridge | Weeks rather than months. With bacteriostatic water added, the usual working figure is four weeks, and making that possible is the job of its preservative |
| Mixed, then frozen | Not recommended. Peptides are torn by ice crystals, and each freeze–thaw cycle compounds the damage |
These are the standard figures for lyophilised peptides in general; no stability study on a single batch produced them. Time is gained by keeping it cold and dry, and lost to damp, warmth, light and rough handling. A certificate of analysis is available on request.
Is DSIP legal in the UK?
Here it is supplied strictly as an unlicensed compound for laboratory research use only. No UK marketing authorisation covers DSIP and it is not a licensed medicine, nor is it intended for human or veterinary use, or for food.
Compounds of this kind are not controlled drugs, and they can lawfully be sold as laboratory material; it is selling or marketing them for use by people that the law does not allow. That boundary is why this site carries no dose, protocol, route, frequency or medical claim, and why an emailed request for one is declined as well.
Some molecules in this range are also present in a licensed medicine marketed under a brand name. Its authorisation covers only the finished product for which it was granted, not the molecule in any other setting. Read the full terms.
Questions about DSIP
What do the letters DSIP mean?
They stand for delta sleep-inducing peptide.
How many residues are in DSIP?
Nine in all.
Where in the UK can I buy DSIP?
In the UK, diluents.co.uk supplies DSIP in one 5mg size only, as vials, priced from £19.99. It leaves British stock with a British courier, so there are no import payments, no handling and no customs officer opening the box. Per milligram, that works out at £4.00. Because it is supplied as freeze-dried powder, the concentration is whatever you choose when it is mixed. It is also a component of 1 other product in the range. Orders placed before 2pm on a weekday go out the same day, tracked and in plain packaging. Each batch goes through third-party lab testing and returns an HPLC result of ≥99%; the certificate covering yours is available on request, and for the steps, see how to order.
What does DSIP cost?
Prices begin at £19.99 with the 5mg, £4.00 a milligram. Delivery costs £4.95, and above £75 there is no charge at all.
How much bacteriostatic water goes into DSIP?
That is up to you, since the volume added is what sets the strength. On the 5mg vial, 5 mg/ml comes from 1ml, 2.5 mg/ml from 2ml and 1.67 mg/ml from 3ml, while the 5mg of material inside does not change. Every one of these figures is a concentration and none is a dose.
How do you store DSIP?
Unopened and dry, it lasts for years in a freezer at −20 °C, for months refrigerated at 2–8 °C and for weeks at room temperature; the colder and drier the conditions, the longer it keeps. Once mixed with bacteriostatic water it belongs upright in the fridge, where four weeks is the usual working figure. A mixed vial must never be frozen, because ice crystals rip peptides apart and every freeze–thaw cycle repeats the damage.
What is the legal status of DSIP in the UK?
Our DSIP is supplied strictly for laboratory research, as an unlicensed research compound and for no other purpose. No UK marketing authorisation covers the product we sell, so it is not a licensed medicine; it is also not for human or veterinary use. Nor are we a pharmacy.
Can I see a certificate for your DSIP, and what purity is it?
Yes. HPLC puts it at ≥99%, and on request we send the certificate of analysis that matches the material in your order. To check where current stock stands before you place an order, just ask and we will tell you.
References
- Delta sleep-inducing peptide. European journal of anaesthesiology, 2001.. PMID 11437870
- Delta-sleep-inducing peptide (DSIP): a review. PMID 6145137
- Delta sleep-inducing peptide (DSIP): a still unresolved riddle. Journal of neurochemistry, 2006.. PMID 16539679
Follow any link to read the original paper in full.