Where to buy DSIP (also sold as Delta sleep-inducing peptide): the 10 vendors below are the ones we have a dated product-page price for, ranked on documentation first and price second. Nothing here is typed from memory — every number links to a date.
Reference size 10mg — the size most of these vendors sell. Other sizes we have on record are listed per vendor.
| # | Vendor | Rubric | 10mg price | Other sizes | Trustpilot | Buy |
|---|---|---|---|---|---|---|
| 1 | Purgo LabsPartner SteriGenix · Freedom Diagnostics | 10/10 | $35.99 ($3.60/mg · 23 Sept 2026 · sale; list $44.99 struck) | — | 4.7 (88 reviews) | HEALTH 20% off every order |
| 2 | Peptide GiantsPartner Janoshik Analytical · Vanguard Laboratory | 10/10 | $38.00 ($3.80/mg · 23 Sept 2026 · sale; list $55.00 struck) | 5mg $21.99 | 4.6 (63 reviews) | health 10% off |
| 3 | Chameleon Peptides Janoshik Analytical · Vanguard | 10/10 | $47.70 ($4.77/mg · 23 Sept 2026 · list price) | — | 5.0 (546 reviews) | Visit |
| 4 | Ameano PeptidesPartner Janoshik Analytical | 9/10 | $58.00 ($5.80/mg · 23 Sept 2026 · list price; sold as 'vial') | — | 4.7 (445 reviews) | compound 10% off |
| 5 | Everest Peptides Freedom Diagnostics | 8/10 | not sold at 10mg | 5mg $26.24 | 4.8 (51 reviews) | Visit |
| 6 | Puratek PeptidesPartner ILS Laboratories (on certificates) · page credits Freedom Diagnostics | 7/10 | $34.95 ($3.50/mg · 23 Sept 2026 · list price; sold as 'DSIP 10mg') | — | profile removed | Visit |
| 7 | PS PeptidesPartner North American Diagnostics | 7/10 | $54.99 ($5.50/mg · 23 Sept 2026 · list price) | 5mg $39.99 | 4.2 (175 reviews) | HEALTH 10% off |
| 8 | Arizen BioLabsPartner Janoshik (on certificates) | 6/10 | $34.99 ($3.50/mg · 23 Sept 2026 · sale; list $49.99 struck) | — | 4.8 (43 reviews) | HEALTH 10% off |
| 9 | Elite Edge BiotechPartner Baler Lab | 6/10 | not sold at 10mg | 5mg $20.00 | 4.8 (175 reviews) | 10COMPOUNDRE 10% off |
| 10 | Licensed PeptidesPartner Vanguard Laboratory (printed 'Vangaurd' on COA panels) | 5/10 | not sold at 10mg | 5mg $53.99 | profile removed | Affiliate5 5% off |
DSIP (delta sleep-inducing peptide) is a nine-residue peptide first isolated decades ago, and it is one of the cheaper compounds for a vendor to stock. Almost every catalog we read for this page listed it, usually in two vial sizes, and often as a 'sleep' product alongside compounds it has nothing to do with chemically.
Short peptides are easy to synthesise but also easy to get wrong in small ways: a truncated or deletion sequence can co-elute with the target on HPLC and inflate a purity figure. The certificate check that matters here is mass-spectrometry identity, which confirms the molecular weight of the full sequence.
The ranking below is by rubric score first and dated price per milligram second. Where a vendor sells two sizes, both are listed; the reference size for ordering is the one the most vendors carry.
What we can verify
Publishes per-lot COAs naming the testing laboratory — SteriGenix and Freedom Diagnostics — with lot numbers, test dates, measured net peptide content and direct verify-at-lab links. HPLC and mass spectrometry testing, US-based fulfilment from Scottsdale, Arizona, same-day dispatch on weekday orders before 2PM EST, and a 60-day money-back guarantee.
Net content: Measured net peptide published per lot (e.g. BPC-157 lot PL-BPC-05: 11.16mg vs 10mg label)
Where it falls short
Smaller independent review base than several competitors (80 reviews). The catalog is peptide-focused, so researchers also working with SARMs or broader research chemicals will need a second supplier.
What we can verify
Names Janoshik Analytical and Vanguard Laboratory; certificates resolve on the lab's own domain (verify.janoshik.com). Product pages list dated batch codes for previous certificates, no account required. Legal entity, Tampa, FL address, EIN and sales-tax number published: Plainview Commerce LLC. Full basket with sized pricing, stable across reads.
Net content: Vanguard Laboratory PDF for lot PG-5101 (TB-500 5mg) reports 4.92mg measured vs 5mg, 99.30% purity — read 6 Sep 2026
Where it falls short
Smallest review base in this batch (59). Measured net content could not be read from the certificate images. The legal entity name appears on the refund policy but not the About page. GLP products sold under house codes PG-1SG / PG-2TZ / PG-3RT.
What we can verify
Public COA & Batch Verification Ledger covering 44 products and 87 batches with 539 COA links, including 380 Janoshik Analytical references (ISO 17025) and 141 Vanguard references. 4.9 across 311 Trustpilot reviews. Card, Apple Pay and ACH payments; free FedEx 2Day shipping from Sacramento; legal entity disclosed (Origin Sourcing Group LLC).
Net content: Janoshik report #194142 (BPC-157 10mg, batch B002) states 11.56mg measured vs 10mg label, 99.557% purity — read on verify.janoshik.com 6 Sep 2026
Where it falls short
Catalog includes hormone-class products (HCG, HGH 191AA, HMG) alongside peptides, a regulatory-sensitive class. Not an affiliate partner — we earn nothing from this vendor, and it ranks where the rubric puts it.
Purgo Labs sits at #1 of 10 on this page: 10/10 on the rubric, 10mg at $35.99 read 23 Sept 2026. Code HEALTH gives 20% off every order. We earn a commission; it did not decide the order above.
Visit Purgo Labs — code HEALTHBefore you order, check the batch
A ranking tells you which vendors have good practices; it cannot tell you about the specific vial you receive. When your order arrives, compare the batch number on the label to the certificate. If they do not match, or there is no batch number, the documentation does not cover what you were sent, regardless of who you bought from. How to read a peptide COA.
As of 23 Sept 2026, 10 of the 59 vendors on our scoreboard list DSIP with a price we have read on the product page: Purgo Labs, Peptide Giants, Chameleon Peptides, Ameano Peptides, Everest Peptides, Puratek Peptides, PS Peptides, Arizen BioLabs, Elite Edge Biotech, Licensed Peptides. Every one of them is scored on the same 10-point rubric; the table above shows the score, the dated price and what you can verify before ordering.
At the 10mg size, the lowest price we have on record is Puratek Peptides at $34.95 (read 23 Sept 2026) — list price; sold as 'DSIP 10mg'. It scores 7/10 on documentation. Price is the second sort key on this page, not the first, because an underdosed vial at a low price is the most expensive outcome.
Purgo Labs, Peptide Giants, Chameleon Peptides share the top score at 10/10: named laboratory, certificates that resolve on the laboratory's own site, measured milligrams against the label, and a published legal identity. The per-criterion evidence, with dates, is on each vendor's review page.
DSIP is sold by these vendors as a research chemical for laboratory use, not for human consumption; none of it is FDA-approved in this form. Legality of purchase varies by jurisdiction and the compound, and it is your responsibility to know your local rules. Our pages assess documentation and pricing; they are not legal or medical advice.
Rubric score first. Among equal scores, the lower verified price per milligram at 10mg. Then the larger independent review base. Affiliate partnership is not an input: 8 of the 10 vendors here are partners and they sit wherever the evidence puts them.
For documentation, no — the same certificate usually covers both sizes from one lot. For price, compare per milligram: the larger size is not always cheaper per milligram, and some vendors price the two sizes almost identically.
Look for a laboratory name, a report number, and a way to check that number on the laboratory's own site. The vendors ranked highest on this page publish certificates that resolve that way; a vendor-hosted PDF with no report number is a claim, not evidence.