Reviewed by Jack Ryan, co-founder & editorial lead · Updated
COA practices 40%9/10
Reputation 20%7.5/10
Transparency 20%9/10
Operations 20%9/10
The four factors average 8.7 by weight, which rounds to 8.5/10.
Direct answer
Is Great Northern Peptides legit?
Yes. PeptidePrices rates Great Northern Peptides 8.5/10. The reconciled library contains 44 distinct certificates: 43 lab-confirmed reports from Freedom Diagnostics and Janoshik, plus one historical AOD report with its unavailable lab state preserved. Two new complete Freedom certificates cover MOTS-c 10 mg and CJC-1295 No DAC 10 mg. Forty-two reports remain current, while two older reports absent from the complete gallery remain historical.
COA evidenceCOA quality 9/10✓COA verified43 of 44 reports on file match the lab's own records and name this vendor
Two new Freedom reports for MOTS-c 10 mg and CJC-1295 No DAC 10 mg match complete official laboratory PDFs and print Great Northern Peptides as the client.
One historical AOD report retains its unavailable lab state. Sample photographs and repeated source exports are separated from report identities. Trustpilot removed the exact-domain profile, leaving no readable independent customer-review aggregate. The certificate coverage, working card checkout and published Canadian shipping terms support the 8.5/10 rating.
01
Certificate program
Reviewed October 4, 2026: Great Northern Peptides’ complete 46-product shop supplies 42 current certificate images. The merged library contains 44 distinct report identities: 43 lab-confirmed reports (40 Freedom Diagnostics and three Janoshik) and one historical AOD-9604 report with its retained unavailable lab state. Forty-two reports are current; the AOD report and the February GLP-3R 20 mg report no longer appear in the current gallery and remain historical. Four repeated report-ID rows and an HMG sample photograph resolve to their corresponding complete certificates without counting as additional reports. Two new Freedom reports print Great Northern Peptides as client: MOTS-c 10 mg, search code Grea2608270380, lot GNP-MS10-001, measures 10.09 mg at 99.50%; CJC-1295 No DAC 10 mg, Grea2608270381, lot GNP-CND10-001, measures 10.96 mg at 99.87%. Both complete official PDFs match the merchant images by client, identity, nominal amount, lot, dates, results and graphs. The reports cover LC-MS identity, HPLC-UV purity and measured content, with complete chromatograms and mass confirmation; they include no endotoxin, sterility or heavy-metals panel. The library retains 46 complete report exports/pages, including both native images and official PDFs of the two new reports. Current source photographs are separated from certificate files.
02
Review record
PeptidePrices found no readable independent customer-review record for the exact domain. Trustpilot states that the profile has been removed and that the business is no longer visible on its platform, and the storefront publishes no customer rating or order count. We set the reputation factor at 7.5/10 with this customer-review gap visible. A September Canadian Reddit discussion includes positive comments about fast shipping and support, but some posts also share referral/coupon codes. These individual experiences are a limited source rather than an independent review aggregate.
03
Catalog, ordering, and shipping
The current comparison catalog has 35 product-and-strength rows priced in Canadian dollars. Great Northern sells only within Canada. Checkout takes credit card and Interac e-Transfer. Canada Post Express Post costs CA $20, with free delivery over CA $250; the shipping policy says most orders ship the next business day. Damaged or defective items may be returned after a Return Merchandise Authorization request within 15 days, while peptides are generally non-returnable.
04
Company disclosure and rating
Great Northern Peptides publishes an About page, testing information, FAQs, and shipping, return, terms, and privacy policies. It answers support enquiries by email. The site does not publish a street address, legal entity name, or company number. These disclosures support the transparency factor of 9/10; card checkout and the published fulfillment terms support operations at 9/10.
Details
Payment methods
Credit/debit card
In stock
29 products
Ships to
Canada
Prices checked
Products (32)
32 products
Peptide
Price
Package
Stock
BPC-157Verified COA Freedom Diagnostics · Report date Feb 22, 2026 · Purity 99.237%
Top 5 of 14 vendors that reached the cheapest five
Frequently asked questions
Is Great Northern Peptides legit?
Yes. PeptidePrices rates Great Northern Peptides 8.5/10. The reconciled library contains 44 distinct certificates: 43 lab-confirmed reports from Freedom Diagnostics and Janoshik, plus one historical AOD report with its unavailable lab state preserved. Two new complete Freedom certificates cover MOTS-c 10 mg and CJC-1295 No DAC 10 mg. Forty-two reports remain current, while two older reports absent from the complete gallery remain historical. Affiliate links never affect the score.
Does Great Northern Peptides have a coupon code?
Code peptideprices gives customers 10% off. Use the PeptidePrices referral link on this page and confirm the discount at checkout.
Does Great Northern Peptides publish COAs?
COA verified. 43 of 44 reports on file match the lab's own records and name this vendor.
What do customer reviews say about Great Northern Peptides?
We could not find an established independent review profile for Great Northern Peptides. The evidence summary on this page explains what we could and could not check.
Does Great Northern Peptides publish certificates of analysis?
Yes. The October 4, 2026 review reconciles 44 report identities: 40 lab-confirmed Freedom Diagnostics reports, three lab-confirmed Janoshik reports and one historical AOD report with an unavailable lab file. Forty-two reports remain in the current gallery; two absent older reports remain historical. The reports provide identity, purity and measured-content results. Two new complete Freedom PDFs match their merchant images by printed client, identity, amount, lot, dates, results and graphs. Duplicate source images and sample photographs are not counted as extra certificates.
What is the Great Northern Peptides coupon code?
Use code peptideprices for 10% off. PeptidePrices last verified the current Great Northern Peptides offer on November 6, 2026. Enter the code separately at checkout. Free delivery begins at CA $250.
Where does Great Northern Peptides ship?
Inside Canada only. Canada Post Express Post costs CA $20 flat with delivery in about one to three business days, and shipping is free over CA $250. Most orders ship the next business day.
How can I pay at Great Northern Peptides?
Checkout takes credit card and Interac e-Transfer.
Does Great Northern Peptides accept returns?
Damaged or defective items may be returned if a Return Merchandise Authorization is requested within 15 days of purchase, and returns without an RMA cannot be processed. Peptides are generally non-returnable because of handling and temperature sensitivity.
