Best sources ranked · 2026

Best Oxytocin Sources

20 US vendors carry Oxytocin. Ordered below by the lab-rule score of each vendor’s certificate for Oxytocin, then by the vendor’s published score; prices are per milligram. A naturally occurring nine-amino-acid neuropeptide hormone. Sold for laboratory research use only.

Vendors
20

Vendors

With COAs
13

With COAs

Best $/mg
$0.80

Best $/mg

Every Oxytocin 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.

9.0/103 base, +2 Kovera Labs tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.648certificate

Vendor score 7.73/10Strong

Price per mg
$4.50
Best price
$45.00 / 10mg
Shop LabFirst Peptides → (opens in new tab)
9.0/103 base, +2 Kovera Labs tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.652certificate

Vendor score 7.55/10Strong

Price per mg
$22.00
Best price
$44.00 / 2mg
Shop Ascension Peptides → (opens in new tab)
8.5/103 base, +2 Horizon Analytical tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin (separate report), 0 purity 99.51certificate

Vendor score 7.37/10Strong

Price per mg
$9.80
Best price
$49.00 / 5mg
8.5/103 base, +2 BioRegen tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.93certificate

Vendor score 7.24/10Strong

Price per mg
$6.50
Best price
$64.97 / 10mg
Shop BioLongevity Labs → (opens in new tab)
8.5/103 base, +2 Horizon Analytical tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99.44certificate

Vendor score 6.55/10Fair

Price per mg
$10.80
Best price
$54.00 / 5mg
8.5/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, +0.5 purity 99.78certificate

Vendor score 6.14/10Fair

Price per mg
$4.00
Best price
$39.99 / 10mg
8.0/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.47certificate

Vendor score 7.80/10Strong

Price per mg
$5.80
Best price
$58.00 / 10mg
Shop Ameano Peptides → (opens in new tab)
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.1certificate

Vendor score 6.99/10Fair

Price per mg
$3.80
Best price
$37.99 / 10mg
7.0/103 base, +2 Vanguard Laboratory tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, -1.5 purity 98.78certificate

Vendor score 6.14/10Fair

Price per mg
$29.50
Best price
$59.00 / 2mg
Shop Hello Stacks → (opens in new tab)
5.0/103 base, +2 AV Analytics tier A-, no purity figurecertificate

Vendor score 4.80/10Weak

Price per mg
$6.00
Best price
$60.00 / 10mg
Show 10 more carriers
2.0/10no laboratory named on the certificate = 2.0 flatcertificate

Vendor score 5.39/10Weak

Price per mg
—
Best price
—
Shop Swiss Chems → (opens in new tab)
0.0/10posted copy differs from the lab's copy = 0certificate

Vendor score 7.43/10Strong

Price per mg
$13.80
Best price
$69.00 / 5mg
0.0/10no certificatecertificate

Vendor score 7.15/10Strong

NoneNo third-party COA was publicly available at audit time
Price per mg
$4.50
Best price
$44.95 / 10mg
0.0/10no certificatecertificate

Vendor score 6.97/10Fair

NoneNo third-party COA was publicly available at audit time
Price per mg
$6.00
Best price
$59.99 / 10mg
Shop Limitless Biotech → (opens in new tab)
0.0/10no certificatecertificate

Vendor score 5.95/10Fair

NoneNo third-party COA was publicly available at audit time
Price per mg
Out of stock
Best price
—
Shop NextGen Peps → (opens in new tab)
0.0/10posted copy differs from the lab's copy = 0certificate

Vendor score 5.60/10Fair

Price per mg
$9.18
Best price
$45.90 / 5mg
0.0/10no certificatecertificate

Vendor score 4.70/10Weak

NoneNo third-party COA was publicly available at audit time
Price per mg
$13.80
Best price
$69.00 / 5mg
0.0/10no certificatecertificate

Vendor score 4.45/10Weak

Login-gatedCOAs are provided but sit behind the vendor's login wall
Price per mg
$15.00
Best price
$30.00 / 2mg
0.0/10no certificatecertificate

Vendor score 3.23/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$4.50
Best price
$45.00 / 10mg
0.0/10no certificatecertificate

Vendor score 2.13/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$0.80
Best price
$80.00 / 10 x 10mg pack

“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 Oxytocin

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

Highest-placed partner

LabFirst Peptides9.0/10 certificate

The highest-placed affiliate partner in the table above for Oxytocin: certificate 9.0/10, vendor score 7.73/10.

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

Largest partner reader code

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

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

Oxytocin: Frequently Asked Questions

Who has the best Oxytocin?

In our 2026 audit, LabFirst Peptides is listed first for Oxytocin: its certificate for Oxytocin scores 9.0/10 on our lab rule, and its published vendor score is 7.73/10. The full ordered table is on this page.

What is the cheapest Oxytocin per mg?

The lowest recorded price per milligram for Oxytocin 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 Oxytocin 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 Oxytocin; 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.

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