Name: DSIP 5mg (10 Vials / Kit)
Brand: HK Peptide
SKU: HK-DS5
Price: 50.00 USD
Availability: InStock

DSIP at a glance

Delta sleep-inducing peptide was isolated by a Swiss research group from the blood of rabbits whose sleep had been induced by electrical stimulation of the brain, and its name reflects that origin. The sequence, Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu, is short and fully defined. DSIP-like immunoreactivity has since been reported in the brain, pituitary and peripheral tissues, yet a precursor protein or gene has not been clearly identified. Here it is supplied as lyophilized powder for laboratory investigation.

Price and availability

A kit of 10 vials at 5mg each (50 mg in total) from HK Peptide, shipped from Hong Kong, Hong Kong. $50.00 buys the whole kit, which is $1.00/mg. 11 brands sell DSIP on GLP1 Forum Escrow, with a typical price of $0.81–$1.10 per mg (median $0.90); this listing is inside that range. Funds stay in escrow and are released to HK Peptide only when you mark the order as received.

This listing: HK Peptide DSIP

Brand: HK Peptide
Kit: 10 vials × 5 mg (50 mg in total)
Price per vial: $5.00
Price per mg: $1.00
Other strengths: 15mg $140.00
Also sold by: Jinlu Peptides 5mg $121.50 · SSRBIO 5mg $42.48 · Lianhua Peptide Co. 5mg $40.50 · TFC Peptides 5mg $40.00 · Uther Peptide 5mg $55.00 · Cyprus Peptides 5mg $97.00

Lab testing

HK Peptide published a Janoshik #227959 report for this compound. Test: Purity & Content (HPLC). Result: 99.49% purity · 14.99 mg. Tested Sep 11, 2026. The vial tested was a different strength than this listing, so treat it as evidence for the compound and ask for the batch COA for this exact strength. Verification key JUPS6P1RUZ4T can be checked at janoshik.com.

View the report · How to read it (Testing 101) · Every report for this compound

Bought through escrow: the brand is only paid after you confirm delivery. If the parcel never arrives, or an independent test shows the wrong compound or a significant under-fill, open a claim before releasing payment.

What it is studied for

How DSIP acts is still unclear, and that uncertainty runs through the literature. Animal studies variously report shifts in slow-wave sleep, effects on corticotropin and luteinizing-hormone release, modulation of stress responses, and antioxidant activity in tissue preparations. Proposed explanations include interaction with glutamate NMDA receptors, adrenergic signaling or opioid-related pathways, but none has been confirmed as a primary target. Some authors suggest DSIP behaves as a general modulator rather than a dedicated sleep signal, an idea consistent with how variable its sleep effects have been between studies.

Research and regulatory status

Most DSIP research dates from the years following its 1977 discovery and was carried out in rodents, rabbits and isolated tissues, with a handful of small human studies on sleep and withdrawal states that produced inconsistent findings. It never advanced to an approved therapeutic, and newer publications are relatively scarce. Readers should treat older positive reports cautiously, since methods for peptide purity analysis and sleep measurement have changed substantially since that work was done.

Checking the lab data

Since DSIP is a defined nonapeptide, mass spectrometry should confirm a single dominant species matching the calculated mass of the expected sequence; tryptophan oxidation products are worth watching for. HPLC purity should be shown with a chromatogram rather than a bare number, and the report should list peptide content, counter-ion, a white uniform cake, the testing laboratory's name and a batch number that matches the vial label.

This listing has an independent lab report attached; the testing panel above summarises what the tested sample contained against its label.

Listing details

Compound: DSIP
Synonyms: Delta Sleep-Inducing Peptide
Class: Neuropeptide (nonapeptide)
Format: Lyophilized (freeze-dried) powder
Vial strength: 5mg
Vials per kit: 10
Total content: 50 mg
Price per mg: $1.00
Sold by: HK Peptide
Ships from: Hong Kong, Hong Kong
Lab report: Independent report attached

Storage and preparation

Keep unopened freeze-dried vials cold, sealed and out of the light; moisture is what degrades a lyophilized cake fastest. After reconstitution, refrigerate the solution and work within the stability window your protocol sets.

Concentration arithmetic: one 5 mg vial dissolved in 2 mL gives 2.5 mg/mL, or 5 mg/mL in 1 mL. The Research Lab calculator in your dashboard handles any other volume.

Buyer questions

Where does the name delta sleep-inducing peptide come from?

Delta refers to the slow, high-amplitude brain waves of deep non-REM sleep. The researchers who isolated the peptide believed it was the factor responsible for transferring that sleep state from one animal to another. Later work showed its effects were neither consistent nor limited to sleep, but the original name stuck.

Why has research interest in DSIP declined?

Without an identified receptor or gene, it was hard to build a clear mechanistic account, and replication of the early sleep findings was uneven. Attention in sleep science shifted toward systems such as orexin and adenosine signaling, which had better-defined molecular targets. DSIP remains of interest mainly as a historical and exploratory research compound.

How much DSIP is in this listing?

10 vials of 5mg each — 50 mg in all. Where a lab report exists, the testing panel above shows what the brand's tested sample actually measured.

When does HK Peptide get paid?

Only after you confirm delivery. Until then the payment is held in escrow, and you can open a claim if anything is wrong with the order.

Supplied for laboratory research only. Not for human or veterinary use, and not a substitute for any prescription medicine. Nothing on this page is medical advice.