Great Northern Peptides reviews
Great Northern Peptides at a glance
- PepFinder Score
- 7.6/10
- Based in
- Canada
- Products tracked
- 48 across 37 peptides
- Price level
- 18% below the CA market median
- Testing evidence
- Stated by the store, no certificates on file
- Verified store
- Not yet
- Online for
- About 1 year
- Last checked
- 7 Nov 2026
PepFinder currently tracks 48 products from Great Northern Peptides across 37 peptides. Its listed prices per mg are 18% below the CA market median, across 41 listings we could compare. The cheapest listing we track is CA$45. PepFinder last read its listings on 7 Nov 2026.
PepFinder rating
Out of 10
Customer rating
No customer reviews yet
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Best for: Low prices and large product selection
- Large range with 48 listed products
- Refund policy not yet confirmed
How its prices compare · 41 listings checked against the market
We may earn a commission. How this works
Great Northern Peptides review: what we found
Last checked 7 Nov 2026 · All sources
What PepFinder checked
Observed by our checks or taken from public records
- We read 48 listings across 37 peptides from its website.Details · 7 Nov 2026
- Its comparable prices are 18% below the market median per mg (41 listings compared in the same currency).Details · 7 Nov 2026
- Domain age: 2025-08-20 (checked by PepFinder against an independent source)Domain age ↗ · 24 Sept 2026
- The Internet Archive's earliest capture of greatnorthernpeptides.com is dated 2025-10-31.Internet Archive: first capture ↗ · 23 Sept 2026
- Recorded as serving Canada: its catalogue is priced in CAD and it appears in Canada search results. Where the business is based is not stated on its website.PepFinder editorial ↗ · 23 Sept 2026
What the store says
The store's own statements, not checked by PepFinder
- The supplier states its products are independently tested: “…peptides Shop All Peptides Lab Tested Every peptide we offer undergoes rigorous independent lab testing to guarantee 99%+ purity and correct quantity—so yo…”States independent testing ↗ · 23 Sept 2026
- The supplier names Freedom Diagnostics in connection with testing: “…for metabolic and obesity treatment. Each batch is independently lab-tested by Freedom Diagnostics Lab to ensure superior purity and consistency, giving you t…”Names Freedom Diagnostics ↗ · 23 Sept 2026
- Business location: CA (as stated on the supplier's website, reviewed by PepFinder)Business location ↗ · 9 Oct 2026
- The website publishes a contact page.Publishes contact details ↗ · 23 Sept 2026
- The supplier's homepage links to a terms policy page.Linked from the supplier's homepage ↗ · 23 Sept 2026
Not yet known
Gaps in the record, not faults
- Whether its testing claims hold up: we have not yet seen and reviewed one of its certificates.
- Not yet found on its website: payment methods, customer support channels, public batch numbers.Details
- What ordering is like: no PepFinder customer has reviewed it or reported an order yet.
PepFinder has not bought from or tested this store's products. Request a correction with evidence.
No customer reviews of Great Northern Peptides yet
Ordered from Great Northern Peptides? A review or a short report of dispatch, delivery, payment or support helps the next buyer. Reviews are moderated; the store can reply but not remove them.
Rating by category
How we rate- Product selection
- 9.0 / 10
- Value
- 7.0 / 10
- Reliability
- 7.0 / 10
- Delivery
- 10.0 / 10
- Customer service
- 5.0 / 10
- Payment options
- Not enough data
- Review sentiment
- Not enough data
- Testing and traceability
- Not enough data
- Information availability
- Good
Why does PepFinder say this?
We can show a source for 12 of the 15 facts that matter about a store (who runs it, contact details, shipping, payments, testing, prices). Not yet confirmed: payment methods, customer support channels, public batch numbers. “Not confirmed” means we have not found it, not that the answer is no. See sources.
Popular products
Checked 7 Nov 2026| Product | Supplier price |
|---|---|
| CA$225.00 CA$5.63/mg 20% below average | |
| CA$125.00 CA$3.13/mg 35% below average | |
| CA$60.00 CA$0.60/mg 21% below average | |
| CA$85.00 CA$1.70/mg 35% below average | |
| CA$50.00 CA$2.50/mg 36% below average | |
| CA$65.00 CA$6.50/mg 12% below average |
We may earn a commission. How this works
Prices as listed by the supplier when we last checked; the supplier confirms the final price. “vs market” compares price per mg with the median across tracked suppliers listing the same peptide in the same currency and serving this store's region, never converted.
How its prices compare
Great Northern Peptides lists in CAD. We compared 41 of its 48 listings with the median price per mg across the other stores that list the same peptide in CAD and serve Canada (6 to 34 stores per product). Prices are never converted between currencies, so this is a like-for-like comparison for a buyer in Canada.
Taken together, its typical listing sits 18% below that market median. Behind that: 29 products priced below most stores, 5 within 5% of the median, and 7 products priced above most stores. A store is rarely the cheapest or the dearest on everything, so the product you want matters more than the overall figure.
Priced below most stores (29)
| Product | Price | vs market median |
|---|---|---|
| Cerebrolysin 60mg | CA$125.00 | 67% below |
| CJC-1295 10mg | CA$45.00 | 66% below |
| Epitalon 50mg | CA$85.00 | 56% below |
| DSIP 15mg | CA$50.00 | 44% below |
| NAD+ 1000mg | CA$80.00 | 41% below |
| Cartalax 20mg | CA$50.00 | 36% below |
And 23 more in the full catalogue below.
Priced above most stores (7)
| Product | Price | vs market median |
|---|---|---|
| Retatrutide 10mg | CA$90.00 | 29% above |
| Melanotan II 10mg | CA$55.00 | 14% above |
| Pinealon 10mg | CA$55.00 | 12% above |
| Semax 10mg | CA$55.00 | 10% above |
| PT-141 10mg | CA$55.00 | 10% above |
| Selank 10mg | CA$55.00 | 10% above |
And 1 more in the full catalogue below.
Price per mg lets vials of different sizes be compared. A higher price can reflect a smaller vial, included shipping, or testing the store pays for; the per-peptide price pages show every store side by side. Prices are as the store listed them when we last checked.
Pros and things to consider
Pros
- Large range with 48 listed products
Things to consider
- Refund policy not yet confirmed
- Has not completed PepFinder verification (most suppliers have not)
From PepFinder's own checks of the supplier's website and public records. “Not confirmed” means we have not found it yet. Request a correction.
About Great Northern Peptides
Who they are and what they sell
Great Northern Peptides is based in Canada. It lists 48 products across 37 peptides. It states it ships to Canada. Payment methods are not stated. Its PepFinder Score is 7.6 out of 10. It has no customer reviews on PepFinder yet. PepFinder last read its website on 7 Nov 2026.
Great Northern Peptides is a research-peptide store based in Canada. We track 48 of its listings across 37 peptides, including Retatrutide, MOTS-c, Tesamorelin, Tirzepatide, CJC-1295 and 5-Amino-1MQ. It has no customer reviews on PepFinder yet.
To see whether Great Northern Peptides is good value, compare its prices per mg with other stores on Retatrutide prices in Canada, MOTS-c prices in Canada and Tesamorelin prices in Canada. The “Is Great Northern Peptides legit?” checks below cover contact details, payment, delivery and testing. Before a first order, read how to read a peptide COA and compare other suppliers in Canada.
Store and verification
Unclaimed · 8 legitimacy checks
Store information
- Trading name
- Great Northern Peptides
- Location
- Canada
- Domain first seen
- 20 Aug 2025
- First tracked by us
- 23 Sept 2026
- Estimated time active
- 1.2 years
- info@greatnorthernpeptides.com
Is Great Northern Peptides legit? What we can check
No website can promise that a supplier is trustworthy. These are the checks we can make from public records, the supplier’s own website and our reviews. They are the same checks as in our guide to spotting an unreliable supplier.
Website history (Not known)
Domain first seen between one and two years ago.
Ways to get in touch (Not known)
Contact channels not yet recorded.
Written policies (In place)
terms published.
Independent testing (Not known)
Great Northern Peptides states that its products are independently tested, names Freedom Diagnostics. PepFinder has not yet collected or reviewed any of its certificates, so this is the supplier's own claim.
PepFinder verification (Not known)
Not verified. Most suppliers are not; verification is voluntary.
Regulator notices and warnings (In place)
None found in our records.
Card payments (Not known)
Payment methods not yet recorded.
Customer reviews (Not known)
No reviews on PepFinder yet.
Own this business? Claim this profile — free; reply to reviews and keep your details current.
Shipping and payments
Delivery: ship within Canada? Orders are processed within 1 business day
Testing and certificates of analysis
Great Northern Peptides states that its products are independently tested, names Freedom Diagnostics. PepFinder has not yet collected or reviewed any of its certificates, so this is the supplier's own claim.
Testing transparency
- Certificates of analysis
- Testing claimed, not reviewedSupplier claims
Great Northern Peptides states that its products are independently tested, names Freedom Diagnostics. PepFinder has not yet collected or reviewed any of its certificates, so this is the supplier's own claim.
- Batch-specific COAs
- Not yet assessed
- States third-party testing
- ✓ Yes
- Laboratories named by the supplier
- Freedom Diagnostics
- Lab accreditation identifiable
- Not yet assessed
- Batch numbers public
- Not yet assessed
- Manufacturing/source location disclosed
- Not yet assessed
- Testing documents we hold
- None yet
We record what testing documents state and where they came from. We do not test products, and a certificate is not evidence that a product is safe for any use.
Full catalogue (48 products)
Every listing we track, with search, price per mg and price history
Listed catalogue and prices
48 products · last checked 7 Nov 2026| Product (as listed) | Price | Per mg | Stock |
|---|---|---|---|
| CA$85.00 50mg | CA$1.70 | ||
| CA$65.00 100mg | CA$0.65 | ||
| CA$85.00 10mg | CA$8.50 | ||
| CA$55.00 10mg | CA$5.50 | ||
| CA$65.00 10mg | CA$6.50 | ||
| CA$55.00 5mg | CA$11.00 | ||
| CA$45.00 10mg | CA$4.50 | ||
| CA$65.00 5mg | CA$6.50 | ||
| CA$100.00 10mg | CA$10.00 | ||
| CA$50.00 20mg | CA$2.50 | ||
| CA$125.00 60mg | CA$0.42 | ||
| CA$50.00 15mg | CA$3.33 | ||
| CA$85.00 50mg | CA$1.70 | ||
| CA$60.00 100mg | CA$0.60 | ||
| CA$95.00 70mg | CA$1.36 | ||
| CA$55.00 1500mg | CA$0.04 | ||
| CA$65.00 10000IU | — | ||
| CA$50.00 75iu | — | ||
| CA$75.00 1mg | CA$75.00 | ||
| CA$65.00 10mg | CA$6.50 | ||
| CA$105.00 80mg | CA$1.31 | ||
| CA$55.00 10mg | CA$5.50 | ||
| CA$55.00 10mg | CA$5.50 | ||
| CA$50.00 600mg | CA$0.08 | ||
| CA$45.00 10mg | CA$4.50 | ||
| CA$120.00 40mg | CA$3.00 | ||
| CA$45.00 As listed | — | ||
| CA$55.00 10mg | CA$5.50 | ||
| CA$80.00 1000mg | CA$0.08 | ||
| CA$55.00 10mg | CA$5.50 | ||
| CA$55.00 10mg | CA$5.50 | ||
| CA$90.00 10mg | CA$9.00 | ||
| CA$150.00 20mg | CA$7.50 | ||
| CA$250.00 20mg | CA$6.25 | ||
| CA$225.00 40mg | CA$5.63 | ||
| CA$90.00 As listed | — | ||
| CA$150.00 50mg | CA$3.00 | ||
| CA$55.00 10mg | CA$5.50 | ||
| CA$125.00 20mg | CA$6.25 | ||
| CA$55.00 10mg | CA$5.50 | ||
| CA$65.00 10mg | CA$6.50 | ||
| CA$85.00 10mg | CA$8.50 | ||
| CA$145.00 20mg | CA$7.25 | ||
| CA$75.00 As listed | — | ||
| CA$65.00 10mg | CA$6.50 | ||
| CA$85.00 20mg | CA$4.25 | ||
| CA$125.00 40mg | CA$3.13 | ||
| CA$100.00 As listed | — |
The supplier confirms the final price and availability when you order. Product names, photos, quantities and prices are as publicly listed by the supplier; photos load from the supplier’s own website. “vs market” compares price per mg with the median across tracked suppliers listing the same peptide in the same currency; prices are never converted between currencies. We do not sell these products and give no guidance on their use.
Sources and evidence
Where each fact came from · information availability: good
Evidence Coverage: 66%
What we know about this supplier, and whether we can show you where it came from. “Not known” means we have not found it, not that the answer is no.
| Fact | Status | Last observed |
|---|---|---|
| Business location | Known, sourced | 30 days ago |
| Contact details | Known, sourced | 46 days ago |
| Shipping destinations | Known, sourced | 30 days ago |
| Stated delivery time | Known, sourced | 30 days ago |
| Payment methods | Not known | — |
| Customer support channels | Not known | — |
| Refund or returns policy | Known, no source shown | — |
| Terms of sale | Known, sourced | 46 days ago |
| Domain age | Known, sourced | 45 days ago |
| Certificates of analysis | Known, no source shown | — |
| Independent testing | Known, sourced | 46 days ago |
| Testing laboratory | Known, sourced | 46 days ago |
| Public batch numbers | Not known | — |
| Product catalogue | Known, sourced | 1 day ago |
| Prices | Known, sourced42 of 48 listed prices can be compared per mg | 1 day ago |
Evidence and sources
| Topic | Claim | Basis | Source type | Captured | Last checked | Source |
|---|---|---|---|---|---|---|
| Shipping policy | Business location: CA (as stated on the supplier's website, reviewed by PepFinder) | Supplier-stated | Supplier website | 1 Oct 2026 | 30 days ago | Business location |
| Domain | Domain age: 2025-08-20 (checked by PepFinder against an independent source) | Verified fact | Other | 24 Sept 2026 | 45 days ago | Domain age |
| Pricing | 48 peptide listings read from the supplier's own catalogue. Prices and stock are as the site listed them at capture. | Supplier-stated | Supplier website | 23 Sept 2026 | 1 day ago | Supplier's public product catalogue |
| Pricing | 29 peptide listings read from the supplier's own catalogue (woocommerce). Prices and stock are as the site listed them at capture. | Supplier-stated | Supplier website | 23 Sept 2026 | 46 days ago | Supplier's public product catalogue |
| Domain | The Internet Archive's earliest capture of greatnorthernpeptides.com is dated 2025-10-31. | Verified fact | Domain record | 23 Sept 2026 | 46 days ago | Internet Archive: first capture |
| Shipping policy | The website states: “…ship within Canada? Orders are processed within 1 business day…” | Supplier-stated | Supplier website | 23 Sept 2026 | 46 days ago | States a delivery time |
| Contact details | The website publishes a contact page. | Supplier-stated | Supplier website | 23 Sept 2026 | 46 days ago | Publishes contact details |
| Testing claim | The supplier states its products are independently tested: “…peptides Shop All Peptides Lab Tested Every peptide we offer undergoes rigorous independent lab testing to guarantee 99%+ purity and correct quantity—so yo…” | Supplier-stated | Supplier website | 23 Sept 2026 | 46 days ago | States independent testing |
| Testing claim | The supplier names Freedom Diagnostics in connection with testing: “…for metabolic and obesity treatment. Each batch is independently lab-tested by Freedom Diagnostics Lab to ensure superior purity and consistency, giving you t…” | Supplier-stated | Supplier website | 23 Sept 2026 | 46 days ago | Names Freedom Diagnostics |
| Pricing | 29 peptide listings read from the supplier's own catalogue (woocommerce). Prices and stock are as the site listed them at capture. | Supplier-stated | Supplier website | 23 Sept 2026 | 46 days ago | Supplier's public product catalogue |
| Shipping policy | Recorded as serving Canada: its catalogue is priced in CAD and it appears in Canada search results. Where the business is based is not stated on its website. | Editorial assessment | PepFinder editorial | 23 Sept 2026 | 46 days ago | Source |
| Pricing | 29 peptide listings read from the supplier's own catalogue (woocommerce). Prices and stock are as the site listed them at capture. | Supplier-stated | Supplier website | 23 Sept 2026 | 46 days ago | Supplier's public product catalogue |
| Shipping policy | The supplier's homepage links to a shipping policy page. | Supplier-stated | Supplier website | 23 Sept 2026 | 46 days ago | Linked from the supplier's homepage |
| Terms | The supplier's homepage links to a terms policy page. | Supplier-stated | Supplier website | 23 Sept 2026 | 46 days ago | Linked from the supplier's homepage |
Verified fact: checked by us against an independent source. Supplier-stated: what the supplier says, not independently confirmed. User report: submitted by a user. Editorial assessment: our judgement. Spotted an error? Request a correction.
Supplier history
- 3 Nov 2026PriceTirzepatide 20mg (20mg): price down 15%
- 3 Nov 2026PriceTesamorelin 20mg (20mg): price up 4%
- 3 Nov 2026PriceTesamorelin 10mg (10mg): price up 6%
- 3 Nov 2026PriceSemaglutide 20mg (20mg): price down 17%
- 3 Nov 2026PriceMelanotan 2 10mg (10mg): price up 10%
- 3 Nov 2026PriceKlow Blend 80mg (80mg): price down 5%
- 3 Nov 2026PriceGlow Blend 70mg (70mg): price down 5%
- 3 Nov 2026PriceGHK-CU 100mg (100mg): price down 8%
- 3 Nov 2026PriceEpitalon 50mg (50mg): price down 43%
- 3 Nov 2026PriceDSIP 15mg (15mg): price down 23%
- 3 Nov 2026PriceTirzepatide 40mg (40mg): price down 24%
- 15 Oct 2026CatalogueNew listing: Pinealon 10mg (10mg)
- 15 Oct 2026CatalogueNew listing: AHK-CU 100mg (100mg)
- 15 Oct 2026CatalogueNew listing: MOTS-c 10mg (10mg)
- 15 Oct 2026CatalogueNew listing: MOTS-c
- 15 Oct 2026CatalogueNew listing: CJC-1295 without DAC 10mg (10mg)
- 28 Sept 2026ScoreTransparency Score changed from 5.0 to 8.0Scoring methodology updated
- 25 Sept 2026CatalogueNew listing: CJC-1295 (no DAC) 5mg / Ipamorelin 5mg (5mg)
- 25 Sept 2026CatalogueNew listing: L-Carnitine 600mg (600mg)
- 25 Sept 2026CatalogueNew listing: Klow Blend 80mg (80mg)
- 25 Sept 2026CatalogueNew listing: Glow Blend 70mg (70mg)
- 25 Sept 2026CatalogueNew listing: Cerebrolysin 60mg (5 pack) (60mg)
- 25 Sept 2026CatalogueNew listing: Cartalax 20mg (20mg)
- 25 Sept 2026CatalogueNew listing: ARA-290 10mg (10mg)
- 25 Sept 2026CatalogueNew listing: HMG 75iu (75iu)
- 25 Sept 2026CatalogueNew listing: HCG 10000IU (10000IU)
- 25 Sept 2026CatalogueNew listing: Melanotan 2 10mg (10mg)
- 25 Sept 2026CatalogueNew listing: Kisspeptin 10mg (10mg)
- 23 Sept 2026ScoreTransparency Score changed from 2.5 to 5.0Importer evidence pass: testing claims, contact, company identity, domain age, logos
- 23 Sept 2026ListingSupplier added to the directoryFound in search results and read from its own website by the catalogue importer. Pending editorial review.
How PepFinder rates suppliers
What the rating and the customer rating each measure
The PepFinder rating (out of 10) is our own assessment of a supplier across reliability, product selection, pricing, delivery, customer service, website, payment options, packaging and how much information the supplier makes available. Each part is scored from what we can observe on its website, from public records and from customer reviews; parts we cannot observe are left unscored rather than marked down, and the rating is only shown once enough of them are known. It can move as more of the inputs become available.
The customer rating (out of 5 stars) is simply the average of approved customer reviews, shown from three reviews. Reviews are moderated before publication and suppliers can reply but not remove them.
The price comparison puts each listing's price per milligram against the median across every tracked supplier listing the same peptide in the same currency and serving the same region, so a UK store is measured against stores a UK buyer could order from. Prices are never converted between currencies. Suppliers cannot pay to change any of this; claiming or verifying a profile does not change the rating either.
Transparency Score
Out of 10 · methodology v1 · updated 9 Oct 2026 · 32% of criteria assessed
Testing, documentation and business transparency. Separate from the PepFinder Score. Paid plans and sponsorship cannot change it. How it is calculated
Show every factor
Testing transparency
- ? Publishes certificates of analysisnot assessed
- ? COAs are batch-specificnot assessed
- ✓ States third-party (independent) testing20/20
- ✓ Names the testing laboratories10/10
- ? Laboratory accreditation is identifiablenot assessed
- ✕ COAs reviewed by us in the last 12 months0/15
Contact transparency — 10.0
- ✓ Contact details are public15/15
- ? Manufacturing/source location disclosednot assessed
Documentation — 5.2
- ✓ Sourced evidence on record40/40
- ◐ Share of evidence independently verified4.3/30
- ? Batch numbers are publicnot assessed
- ✕ A testing document checked in the last 6 months0/15
User reviews
No approved reviews yet.
Customer service
Not yet assessed by the editorial team.
Shipping transparency — 10.0
- ? Shipping policy is clearnot assessed
- ✓ Delivery estimate stated30/30
- ✓ Shipping destinations listed30/30
Longevity — 3.8
- ✓ Earliest recorded activity 1.1 years ago
Policy transparency — 10.0
- ? Refund policy is clearnot assessed
- ? Terms of sale are clearnot assessed
- ✓ Refund or returns policy published20/20
- ✓ Terms of sale published20/20
- ✓ Privacy policy published20/20
Compare Great Northern Peptides with other suppliers
| Supplier | Rating | Customer rating | Prices | Products | |
|---|---|---|---|---|---|
 MECP | 6.1 | No reviews yet | 7% above | 142 | Visit store |
 VPeptide | 7.2 | No reviews yet | 20% below | 179 | Visit store |
 Luxara Labs Research Company | 7.0 | No reviews yet | 20% above | 67 | Visit store |
We may earn a commission. How this works
Great Northern Peptides vs MECPGreat Northern Peptides vs VPeptideGreat Northern Peptides vs Luxara Labs Research CompanyAll alternatives to Great Northern Peptides
Great Northern Peptides: common questions
Is Great Northern Peptides legit?
We cannot vouch for any supplier, but we can report what the record shows. Great Northern Peptides meets 2 of the 8 checks we make, with nothing flagged. Each check, and its source, is listed on this page.
Where is Great Northern Peptides based?
Our records place Great Northern Peptides in Canada.
Which countries does Great Northern Peptides ship to?
Great Northern Peptides states that it ships to Canada. Check the supplier's own shipping policy before ordering.
Does Great Northern Peptides publish certificates of analysis?
Great Northern Peptides states that its products are independently tested, names Freedom Diagnostics. PepFinder has not yet collected or reviewed any of its certificates, so this is the supplier's own claim.
How long does Great Northern Peptides take to deliver?
Great Northern Peptides states: "ship within Canada? Orders are processed within 1 business day".
Ready to shop at Great Northern Peptides?
- Large range with 48 listed products
- Refund policy not yet confirmed
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This page provides supplier and market information only and is not medical advice. Disclaimer