Best sources ranked · 2026

Best DSIP Sources

35 US vendors carry DSIP. Ordered below by the lab-rule score of each vendor’s certificate for DSIP, then by the vendor’s published score; prices are per milligram. A nonapeptide (delta sleep-inducing peptide) first isolated from rabbit brain tissue in the 1970s. Sold for laboratory research use only.

Reviewed by the Peptide Source Review teamLast audited How we rate

Vendors
35

Vendors

With COAs
24

With COAs

Best $/mg
$0.98

Best $/mg

Every DSIP source, by certificate

Ordered by the lab-rule score of each vendor's certificate for this product (out of 10), then by the vendor's published score, then alphabetically. How the lab rule scores a certificate. For the market-wide picture, see our 2026 study of peptide vendor testing.

Affiliate links: we may earn a commission if you buy. It never changes a score or rank.

1Southern Aminos
9.0/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.59certificate

Vendor score 8.09/10Strong

Verified (opens in new tab)ILS LaboratoriesTier B+
Price per mg
$7.20
Best price
$36.00 / 5mg
Shop Southern Aminos → (opens in new tab)
2Amino Club
9.0/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.45certificate

Vendor score 8.02/10Strong

Verified (opens in new tab)ILS LaboratoriesTier B+
Price per mg
$6.00
Best price
$29.99 / 5mg
Shop Amino Club → (opens in new tab)
3S1Research
9.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.05certificate

Vendor score 7.75/10Strong

Verified (opens in new tab)Freedom Diagnostics TestingTier A
Price per mg
$2.20
Best price
$22.00 / 10mg
Shop S1Research → (opens in new tab)
4LabFirst Peptides
9.0/103 base, +2 Kovera Labs tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.496certificate

Vendor score 7.73/10Strong

Verified (opens in new tab)Kovera LabsTier A-
Price per mg
$5.40
Best price
$54.00 / 10mg
Shop LabFirst Peptides → (opens in new tab)
5Ascension Peptides
9.0/103 base, +2 Kovera Labs tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.394certificate

Vendor score 7.55/10Strong

Verified (opens in new tab)Kovera LabsTier A-
Price per mg
$6.00
Best price
$60.00 / 10mg
Shop Ascension Peptides → (opens in new tab)
6BioLongevity Labs
9.0/103 base, +2 MDx BioAnalytical Laboratory tier A+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0 accreditation (tested 2026-04-13, before 2026-06-09), +0.5 purity 99.76certificate

Vendor score 7.24/10Strong

Verified (opens in new tab)MDx BioAnalytical LaboratoryTier A+
Price per mg
$11.19
Best price
$55.97 / 5mg
Shop BioLongevity Labs → (opens in new tab)
7Direct Peptides
8.5/103 base, +2 Horizon Analytical tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99.41certificate

Vendor score 7.43/10Strong

Verified (opens in new tab)Horizon AnalyticalTier A-
Price per mg
$4.90
Best price
$49.00 / 10mg
Shop Direct Peptides → (opens in new tab)
8Bluum Peptides
8.5/103 base, +2 Horizon Analytical tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin (separate report), 0 purity 99.41certificate

Vendor score 7.37/10Strong

Verified (opens in new tab)Horizon AnalyticalTier A-
Price per mg
$4.90
Best price
$49.00 / 10mg
Shop Bluum Peptides → (opens in new tab)
9Peptyes
8.5/103 base, +2 Horizon Analytical tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99.14certificate

Vendor score 6.55/10Fair

Verified (opens in new tab)Horizon AnalyticalTier A-
Price per mg
$7.50
Best price
$75.00 / 10mg
Shop Peptyes → (opens in new tab)
10Hello Stacks
8.5/103 base, +2 Vanguard Laboratory tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99.22certificate

Vendor score 6.14/10Fair

Verified (opens in new tab)Vanguard LaboratoryTier B+
Price per mg
$4.90
Best price
$49.00 / 10mg
Shop Hello Stacks → (opens in new tab)
Show 25 more carriers
11Redline Bio Labs
8.5/103 base, +2 AV Analytics tier A-, +1.5 key, +1.5 key confirmed, +0.5 purity 99.81certificate

Vendor score 4.80/10Weak

Verified (opens in new tab)AV AnalyticsTier A-
Price per mg
$4.93
Best price
$74.00 / 15mg
Shop Redline Bio Labs → (opens in new tab)
12Honest Peptide
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.25certificate

Vendor score 7.42/10Strong

Verified (opens in new tab)Freedom Diagnostics TestingTier A
Price per mg
$5.60
Best price
$28.00 / 5mg
Shop Honest Peptide → (opens in new tab)
13Pacific Edge Labs
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.32certificate

Vendor score 7.15/10Strong

Verified (opens in new tab)Freedom Diagnostics TestingTier A
Price per mg
$4.50
Best price
$44.95 / 10mg
Shop Pacific Edge Labs → (opens in new tab)
14StudzPeptides
8.0/103 base, +2 Vanguard Laboratory tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.5certificate

Vendor score 6.99/10Fair

Verified (opens in new tab)Vanguard LaboratoryTier B+
Price per mg
$2.17
Best price
$32.50 / 15mg
Shop StudzPeptides → (opens in new tab)
15Hacker Peptides
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.273certificate

Vendor score 6.32/10Fair

Verified (opens in new tab)Freedom Diagnostics TestingTier A
Price per mg
$3.50
Best price
$17.50 / 5mg
Shop Hacker Peptides → (opens in new tab)
16GhostLabz
8.0/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.41certificate

Vendor score 6.14/10Fair

Verified (opens in new tab)ILS LaboratoriesTier B+
Price per mg
$6.00
Best price
$29.99 / 5mg
Shop GhostLabz → (opens in new tab)
17Swiss Chems
8.0/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.197certificate

Vendor score 5.39/10Weak

Verified (opens in new tab)Janoshik AnalyticalTier B+
Price per mg
—
Best price
—
Shop Swiss Chems → (opens in new tab)
18Ameano Peptides
7.0/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, -1.5 purity 98.91certificate

Vendor score 7.80/10Strong

Verified (opens in new tab)Janoshik AnalyticalTier B+
Price per mg
$5.80
Best price
$58.00 / 10mg
Shop Ameano Peptides → (opens in new tab)
19NuuVive Peptides
6.5/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, -1.5 purity 98.69certificate

Vendor score 6.93/10Fair

Verified (opens in new tab)Janoshik AnalyticalTier B+
Price per mg
$7.73
Best price
$116.00 / 15mg
Shop NuuVive Peptides → (opens in new tab)
20NextSelf Labs
6.5/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, -1.5 purity 97.69certificate

Vendor score 6.26/10Fair

Verified (opens in new tab)ILS LaboratoriesTier B+
Price per mg
$7.00
Best price
$34.99 / 5mg
Shop NextSelf Labs → (opens in new tab)
21Limitless Biotech
5.5/103 base, +2 MZ Biolabs tier A, +0.5 endotoxin, 0 purity 99.51certificate

Vendor score 6.97/10Fair

View (opens in new tab)MZ BiolabsTier A
Price per mg
$11.60
Best price
$57.99 / 5mg
Shop Limitless Biotech → (opens in new tab)
22Azyrion Labs
5.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +0 key not found at the lab, -1.5 purity 98.44certificate

Vendor score 5.45/10Weak

View (key not found) (opens in new tab)Freedom Diagnostics TestingTier A
Price per mg
$9.00
Best price
$89.99 / 10mg
Shop Azyrion Labs → (opens in new tab)
23Based Research
4.5/103 base, +0 Analytical Formulations tier C, +1.5 key, 0 purity 99.2certificate

Vendor score 4.54/10Weak

View (opens in new tab)Analytical FormulationsTier C
Price per mg
$8.00
Best price
$120.00 / 15mg
Shop Based Research → (opens in new tab)
24Prism Labs
2.0/10Proof Point Analytical tier D: independence not established = 2.0 flatcertificate

Vendor score 3.92/10Poor

Vendor report (lab not established) (opens in new tab)Proof Point AnalyticalTier D
Price per mg
$4.00
Best price
$39.99 / 10mg
Shop Prism Labs → (opens in new tab)
25BioInfinity
2.0/10Verum Analytics tier D: independence not established = 2.0 flatcertificate

Vendor score 3.70/10Poor

Vendor report (lab not established) (opens in new tab)Verum AnalyticsTier D
Price per mg
$14.00
Best price
$70.00 / 5mg
Shop BioInfinity → (opens in new tab)
26Rogue Compounds
0.0/10no certificatecertificate

Vendor score 6.88/10Fair

NoneNo third-party COA was publicly available at audit time
Price per mg
—
Best price
—
Shop Rogue Compounds → (opens in new tab)
27FRO Peptides
0.0/10no certificatecertificate

Vendor score 6.50/10Fair

NoneNo third-party COA was publicly available at audit time
Price per mg
$6.60
Best price
$32.99 / 5mg
Shop FRO Peptides → (opens in new tab)
28Peptide Pro
0.0/10posted copy differs from the lab's copy = 0certificate

Vendor score 5.60/10Fair

View COA (differs from lab copy) (opens in new tab)Horizon AnalyticalTier A-
Price per mg
$6.50
Best price
$65.00 / 10mg
Shop Peptide Pro → (opens in new tab)
29Vortex Research
0.0/10no certificatecertificate

Vendor score 5.50/10Fair

NoneNo third-party COA was publicly available at audit time
Price per mg
$6.00
Best price
$29.99 / 5mg
Shop Vortex Research → (opens in new tab)
30Peptide.Express
0.0/10no certificatecertificate

Vendor score 3.76/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$4.50
Best price
$45.00 / 10mg
Shop Peptide.Express → (opens in new tab)
31Drexa Labs
0.0/10no certificatecertificate

Vendor score 3.23/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$4.00
Best price
$40.00 / 10mg
Shop Drexa Labs → (opens in new tab)
32YourFitnessPeptides
0.0/10no certificatecertificate

Vendor score 2.75/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$5.16
Best price
$25.80 / 5mg
Shop YourFitnessPeptides → (opens in new tab)
33Peptara Labs
0.0/10no certificatecertificate

Vendor score 2.38/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$9.50
Best price
$95.00 / 10mg
Shop Peptara Labs → (opens in new tab)
34Welon Peptide Solutions
0.0/10no certificatecertificate

Vendor score 2.13/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$0.98
Best price
$98.00 / 10 x 10mg pack
Shop Welon Peptide Solutions → (opens in new tab)
35Medura Peptides
0.0/10no certificatecertificate

Vendor score 1.63/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$6.00
Best price
$89.99 / 15mg
Shop Medura Peptides → (opens in new tab)

“Shop” links may be affiliate links (rel="sponsored"); we may earn a commission. Affiliate status never affects any rating, rank, or gate. Disclosure.

Affiliate partners carrying DSIP

Affiliate links: we may earn a commission if you buy. It never changes a score or rank.

Highest-placed partner

Amino Club9.0/10 certificate

The highest-placed affiliate partner in the table above for DSIP: certificate 9.0/10, vendor score 8.02/10.

Shop Amino Club → (opens in new tab)

Largest partner reader code

Ascension Peptides50% off

The largest reader discount among our affiliate partners carrying DSIP: 50% off with code PSR50.

Shop Ascension Peptides → (opens in new tab)
Ascension Peptides discount code →

DSIP: Frequently Asked Questions

Who has the best DSIP?

In our 2026 audit, Southern Aminos is listed first for DSIP: its certificate for DSIP scores 9.0/10 on our lab rule, and its published vendor score is 8.09/10. The full ordered table is on this page.

What is the cheapest DSIP per mg?

The lowest recorded price per milligram for DSIP in our audit is the "Best $/mg" figure at the top of this page, and every carrier's price per mg is in the table. Cheapest is not the same as best: the table is ordered by certificate and vendor score, not by price.

How do you rate DSIP vendors?

Ordered by the lab-rule score of each vendor's certificate for this product (out of 10), then by the vendor's published score, then alphabetically. The certificate score is the same lab rule that builds each vendor's lab sub-score, applied to that vendor's certificate for DSIP; the vendor score is the published overall score. Price per mg is shown but does not change the order. See our methodology for the lab rule.

Also available at these peptide pages

GHK-CuMOTS-cBPC-157Ipamorelin

Related peptides

VIP · NeuropeptideBPC-157 · Synthetic peptide fragmentTirzepatide · GLP-1 family (dual agonist)TB-500 · Synthetic peptide fragment

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