Polypeptides reviews
Polypeptides at a glance
- PepFinder Score
- 5.7/10
- Based in
- United Kingdom
- Products tracked
- 33 across 16 peptides
- Price level
- 52% above the UK market median
- Verified store
- Not yet
- Last checked
- 25 Sept 2026
PepFinder currently tracks 33 products from Polypeptides across 16 peptides. Its listed prices per mg are 52% above the UK market median, across 16 listings we could compare. The cheapest listing we track is £35. PepFinder last read its listings on 25 Sept 2026.
PepFinder rating
Out of 10
Customer rating
No customer reviews yet
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Best for: Large product selection
- Large range with 33 listed products
- Delivery times not yet confirmed
How its prices compare · 16 listings checked against the market
We may earn a commission. How this works
Polypeptides review: what we found
Last checked 25 Sept 2026 · All sources
What PepFinder checked
Observed by our checks or taken from public records
- We read 33 listings across 16 peptides from its website; 30 show a price.Details · 25 Sept 2026
- Its comparable prices are 52% above the market median per mg (16 listings compared in the same currency).Details · 25 Sept 2026
- The Internet Archive's earliest capture of polypeptides.uk is dated 2026-03-10.Internet Archive: first capture ↗ · 24 Sept 2026
- The registry's record for polypeptides.uk gives a registration date of 2026-01-13.Domain registration record (RDAP) ↗ · 24 Sept 2026
What the store says
The store's own statements, not checked by PepFinder
- Business location: GB (as stated on the supplier's website, reviewed by PepFinder)Business location ↗ · 9 Oct 2026
- The website links to its returns policy page.Linked policy page ↗ · 24 Sept 2026
- The website links to its terms page.Linked policy page ↗ · 24 Sept 2026
Not yet known
Gaps in the record, not faults
- Not yet found on its website: certificates of analysis, shipping destinations, independent testing, stated delivery time.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 Polypeptides yet
Ordered from Polypeptides? 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
- 7.1 / 10
- Value
- 3.6 / 10
- Reliability
- 7.0 / 10
- Delivery
- Not enough data
- Customer service
- 5.0 / 10
- Payment options
- Not enough data
- Review sentiment
- Not enough data
- Testing and traceability
- Not enough data
- Information availability
- Limited
Why does PepFinder say this?
We can show a source for 7 of the 15 facts that matter about a store (who runs it, contact details, shipping, payments, testing, prices). Not yet confirmed: shipping destinations, stated delivery time, payment methods, customer support channels, certificates of analysis, independent testing, testing laboratory, public batch numbers. “Not confirmed” means we have not found it, not that the answer is no. See sources.
Popular products
Checked 25 Sept 2026| Product | Supplier price |
|---|---|
| £150.00 £5.00/mg 15% above average | |
| £200.00 £5.00/mg 67% above average | |
| £35.00 £0.70/mg 52% above average | |
| £65.00 £1.30/mg 44% below average | |
| £40.00 £8.00/mg 4% above average | |
| £40.00 £8.00/mg 167% above 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
Polypeptides lists in GBP. We compared 16 of its 33 listings with the median price per mg across the other stores that list the same peptide in GBP and serve the UK (44 to 216 stores per product). Prices are never converted between currencies, so this is a like-for-like comparison for a buyer in the UK.
Taken together, its typical listing sits 52% above that market median. Behind that: 2 products priced below most stores, 1 within 5% of the median, and 13 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 (2)
| Product | Price | vs market median |
|---|---|---|
| 5-Amino-1MQ 50 mg | £65.00 | 44% below |
| MOTS-c 40mg Vial | £75.00 | 18% below |
Priced above most stores (13)
| Product | Price | vs market median |
|---|---|---|
| Tirzepatide 10mg Vial | £110.00 | 267% above |
| Wolverine blend 10mg | £100.00 | 186% above |
| Semax 5mg | £40.00 | 167% above |
| Tirzepatide 20mg Vial | £150.00 | 150% above |
| Retatrutide 10mg Vial | £90.00 | 108% above |
| Tirzepatide 30mg Vial | £170.00 | 89% above |
And 7 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 33 listed products
Things to consider
- Delivery times not yet confirmed
- 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 Polypeptides
Who they are and what they sell
Polypeptides is based in the United Kingdom. It lists 33 products across 16 peptides. Shipping countries are not stated. Payment methods are not stated. Its PepFinder Score is 5.7 out of 10. It has no customer reviews on PepFinder yet. PepFinder last read its website on 25 Sept 2026.
Polypeptides is a research-peptide store based in United Kingdom. We track 33 of its listings across 16 peptides, including Retatrutide, Tirzepatide, GHK-Cu, KLOW blend, MOTS-c and NAD+. It has no customer reviews on PepFinder yet.
To see whether Polypeptides is good value, compare its prices per mg with other stores on Retatrutide prices in the UK, Tirzepatide prices in the UK and GHK-Cu prices in the UK. The “Is Polypeptides 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 the UK.
Store and verification
Unclaimed · 8 legitimacy checks
Store information
- Trading name
- Polypeptides
- Location
- United Kingdom
- Domain first seen
- 13 Jan 2026
- First tracked by us
- 24 Sept 2026
- Estimated time active
- 9 months
- info@polypeptides.uk
Is Polypeptides 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 less than a year ago. Most peptide stores are new, so PepFinder does not count this against a store.
Ways to get in touch (Not known)
Contact channels not yet recorded.
Written policies (In place)
terms published.
Independent testing (Not known)
We have not yet checked whether Polypeptides publishes testing documents.
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
What we know about delivery and paying
Testing and certificates of analysis
We have not yet checked whether Polypeptides publishes testing documents.
Testing transparency
- Certificates of analysis
- Testing not yet checked
We have not yet checked whether Polypeptides publishes testing documents.
- Batch-specific COAs
- Not yet assessed
- States third-party testing
- Not yet assessed
- Laboratories named by the supplier
- None found
- 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 (33 products)
Every listing we track, with search, price per mg and price history
Listed catalogue and prices
33 products · last checked 25 Sept 2026| Product (as listed) | Price | Per mg | Stock |
|---|---|---|---|
| £65.00 50 mg | £1.30 | ||
| £20.00 As listed | — | ||
| £35.00 50mg Vial | £0.70 | ||
| £100.00 100mg Pen | — | ||
| £60.00 100mg Vial | £0.60 | ||
| £50.00 As listed | — | ||
| £130.00 80mg Pen | — | ||
| £80.00 80mg Vial | £1.00 | ||
| £25.00 As listed | — | ||
| £35.00 10mg Vial | £3.50 | ||
| £75.00 40mg Vial | £1.88 | ||
| £35.00 As listed | — | ||
| £75.00 500mg Vial | £0.15 | ||
| £250.00 1000mg Pen | — | ||
| £125.00 10mg Pen | — | ||
| £90.00 10mg Vial | £9.00 | ||
| £0.00 20mg Pen | — | ||
| £0.00 20mg Vial | — | ||
| £175.00 30mg Pen | — | ||
| £150.00 30mg Vial | £5.00 | ||
| £0.00 40mg Pen | — | ||
| £40.00 5mg | £8.00 | ||
| £19.00 As listed | — | ||
| £40.00 5mg | £8.00 | ||
| £85.00 As listed | — | ||
| £150.00 10mg Pen | — | ||
| £110.00 10mg Vial | £11.00 | ||
| £150.00 20mg Vial | £7.50 | ||
| £170.00 30mg Pen | — | ||
| £170.00 30mg Vial | £5.67 | ||
| £200.00 40mg Vial | £5.00 | ||
| £225.00 40mg Pen | — | ||
| £100.00 10mg | £10.00 |
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: limited
Evidence Coverage: 40%
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 | 29 days ago |
| Contact details | Known, no source shown | — |
| Shipping destinations | Not known | — |
| Stated delivery time | Not known | — |
| Payment methods | Not known | — |
| Customer support channels | Not known | — |
| Refund or returns policy | Known, sourced | 44 days ago |
| Terms of sale | Known, sourced | 44 days ago |
| Domain age | Known, sourced | 44 days ago |
| Certificates of analysis | Not known | — |
| Independent testing | Not known | — |
| Testing laboratory | Not known | — |
| Public batch numbers | Not known | — |
| Product catalogue | Known, sourced | 43 days agoDue a re-check |
| Prices | Known, sourced16 of 30 listed prices can be compared per mg | 43 days agoDue a re-check |
Evidence and sources
| Topic | Claim | Basis | Source type | Captured | Last checked | Source |
|---|---|---|---|---|---|---|
| Shipping policy | Business location: GB (as stated on the supplier's website, reviewed by PepFinder) | Supplier-stated | Supplier website | 1 Oct 2026 | 29 days ago | Business location |
| Domain | The Internet Archive's earliest capture of polypeptides.uk is dated 2026-03-10. | Verified fact | Domain record | 24 Sept 2026 | 44 days ago | Internet Archive: first capture |
| Domain | The registry's record for polypeptides.uk gives a registration date of 2026-01-13. | Verified fact | Domain record | 24 Sept 2026 | 44 days ago | Domain registration record (RDAP) |
| Other | The website links to its privacy page. | Supplier-stated | Supplier website | 24 Sept 2026 | 44 days ago | Linked policy page |
| Refund policy | The website links to its returns policy page. | Supplier-stated | Supplier website | 24 Sept 2026 | 44 days ago | Linked policy page |
| Terms | The website links to its terms page. | Supplier-stated | Supplier website | 24 Sept 2026 | 44 days ago | Linked policy page |
| Pricing | 33 peptide listings read from the supplier's own catalogue. Prices and stock are as the site listed them at capture. | Supplier-stated | Supplier website | 24 Sept 2026 | 43 days ago | Supplier's public product catalogue |
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
- 28 Sept 2026ScoreTransparency Score changed from 3.1 to 6.5Scoring methodology updated
- 25 Sept 2026CatalogueNew listing: IGF-1LR3
- 25 Sept 2026CatalogueNew listing: Kisspeptin
- 25 Sept 2026CatalogueNew listing: Slupp 332 5mg (5mg)
- 25 Sept 2026CatalogueNew listing: Tesa-morelin
- 25 Sept 2026CatalogueNew listing: Wolverine Stack – 10mg (10mg)
- 25 Sept 2026CatalogueNew listing: Tirz (10mg Vial)
- 25 Sept 2026CatalogueNew listing: Tirz (20mg Vial)
- 25 Sept 2026CatalogueNew listing: Tirz (40mg Vial)
- 25 Sept 2026CatalogueNew listing: KLOW (80mg Vial)
- 25 Sept 2026CatalogueNew listing: KLOW (80mg Pen)
- 25 Sept 2026CatalogueNew listing: Tirz (10mg Pen)
- 25 Sept 2026CatalogueNew listing: Tirz (40mg Pen)
- 25 Sept 2026CatalogueNew listing: Tirz (30mg Pen)
- 25 Sept 2026CatalogueNew listing: Tirz (30mg Vial)
- 24 Sept 2026ListingSupplier added to the directoryDiscovered and read from its own website by the ingestion pipeline; approved by an editor. Pending publication 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
- ? Certificates of analysis (under review or not yet checked)not assessed
- ? COAs are batch-specificnot assessed
- ? States third-party (independent) testingnot assessed
- ✕ Names the testing laboratories0/10
- ? 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 — 4.3
- ◐ Sourced evidence on record28/40
- ◐ Share of evidence independently verified8.6/30
- ? 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 — 0.0
- ? Shipping policy is clearnot assessed
- ✕ Delivery estimate stated0/30
- ✕ Shipping destinations listed0/30
Longevity — 3.2
- ✓ Earliest recorded activity 0.7 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 Polypeptides with other suppliers
| Supplier | Rating | Customer rating | Prices | Products | |
|---|---|---|---|---|---|
 Atlas Peptides | 6.8 | No reviews yet | 12% below | 33 | Visit store |
 Pinnacle Peptides | 6.0 | No reviews yet | ~26% above | 20 | Visit store |
 UK Peptides Online | 7.0 | No reviews yet | 70% below | 109 | Visit store |
We may earn a commission. How this works
Polypeptides vs Atlas PeptidesPolypeptides vs Pinnacle PeptidesPolypeptides vs UK Peptides OnlineAll alternatives to Polypeptides
Polypeptides: common questions
Is Polypeptides legit?
We cannot vouch for any supplier, but we can report what the record shows. Polypeptides meets 2 of the 8 checks we make, with nothing flagged. Each check, and its source, is listed on this page.
Where is Polypeptides based?
Our records place Polypeptides in United Kingdom.
Does Polypeptides publish certificates of analysis?
We have not yet checked whether Polypeptides publishes testing documents.
Ready to shop at Polypeptides?
- Large range with 33 listed products
- Delivery times not yet confirmed
We may earn a commission. How this works
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Something wrong on this page? Request a correction with evidence.
This page provides supplier and market information only and is not medical advice. Disclaimer