PepSource reviews
PepSource at a glance
- PepFinder Score
- 6.2/10
- Based in
- United Kingdom
- Products tracked
- 46 across 14 peptides
- Price level
- 9% above the UK market median
- Testing evidence
- Stated by the store, no certificates on file
- Verified store
- Not yet
- Last checked
- 7 Nov 2026
PepFinder currently tracks 46 products from PepSource across 14 peptides. Its listed prices per mg are 9% above the UK market median, across 19 listings we could compare. The cheapest listing we track is £23. 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: Large product selection
- Large range with 46 listed products
- Accepts card payments, which carry chargeback protection
- Delivery times not yet confirmed
How its prices compare · 19 listings checked against the market
We may earn a commission. How this works
PepSource 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 46 listings across 14 peptides from its website.Details · 7 Nov 2026
- Its comparable prices are 9% above the market median per mg (19 listings compared in the same currency).Details · 7 Nov 2026
- The registry's record for pepsource.co.uk gives a registration date of 2026-07-01.Domain registration record (RDAP) ↗ · 24 Sept 2026
What the store says
The store's own statements, not checked by PepFinder
- The supplier states its products are independently tested: “…Independently Tested.…”States independent testing ↗ · 24 Sept 2026
- The supplier's website links to certificates of analysis or lab results. Documents are not reviewed until an editor checks them.Links a COA / lab results page ↗ · 24 Sept 2026
- Business location: GB (as stated on the supplier's website, reviewed by PepFinder)Business location ↗ · 9 Oct 2026
- The website links to its refund policy page.Linked policy page ↗ · 24 Sept 2026
- The website publishes an email address.Publishes contact details ↗ · 24 Sept 2026
What customers report
Reviews and reports from buyers
- Trustpilot shows 4.3 out of 5 from 9 reviews. Those reviews are Trustpilot's, not moderated by PepFinder.Details
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: shipping destinations, stated delivery time, customer support channels, testing laboratory.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 PepSource yet
Ordered from PepSource? 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.
Latest on Trustpilot
9 reviews · checked 24 Sept 2026
Trustpilot's figure, not ours. From 10 reviews it counts towards Review sentiment, weighted by how many there are, and a long record of good reviews can add to Reliability. Our own reviews count for more.
Rating by category
How we rate- Product selection
- 7.3 / 10
- Value
- 5.6 / 10
- Reliability
- 7.0 / 10
- Delivery
- Not enough data
- Customer service
- 5.0 / 10
- Payment options
- 8.5 / 10
- Review sentiment
- Not enough data
- Testing and traceability
- 4.6 / 10
- Information availability
- Good
Why does PepFinder say this?
We can show a source for 9 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, customer support channels, terms of sale, testing laboratory, 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 |
|---|---|
| £140.00 £3.50/mg 17% above average | |
| £45.00 £0.45/mg 2% below average | |
| £40.00 £4.00/mg 33% above average | |
| £25.00 £2.50/mg 11% below average | |
| £50.00 £5.00/mg 8% below average | |
| £35.00 £3.50/mg 17% 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
PepSource lists in GBP. We compared 19 of its 46 listings with the median price per mg across the other stores that list the same peptide in GBP and serve the UK (40 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 9% above that market median. Behind that: 6 products priced below most stores, 2 within 5% of the median, and 11 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 (6)
| Product | Price | vs market median |
|---|---|---|
| NAD+ 1000mg | £65.00 | 35% below |
| NAD+ 500mg | £40.00 | 20% below |
| MOTS-c 40mg | £75.00 | 18% below |
| Wolverine blend 20mg | £60.00 | 14% below |
| SS-31 10mg | £25.00 | 11% below |
| Tesamorelin 10mg | £50.00 | 8% below |
Priced above most stores (11)
| Product | Price | vs market median |
|---|---|---|
| Adamax 5mg | £55.00 | 100% above |
| BPC-157 5mg | £25.00 | 67% above |
| DSIP 5mg | £23.00 | 44% above |
| BPC-157 10mg | £40.00 | 33% above |
| Selank 10mg | £35.00 | 17% above |
| Tirzepatide 40mg | £140.00 | 17% above |
And 5 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 46 listed products
- Accepts card payments, which carry chargeback protection
- Refund or returns policy published
Things to consider
- Delivery times 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 PepSource
Who they are and what they sell
PepSource is based in the United Kingdom. It lists 46 products across 14 peptides. Shipping countries are not stated. It accepts Visa, Mastercard, American Express, PayPal, Apple Pay, Google Pay and Klarna. Its PepFinder Score is 6.2 out of 10. It has no customer reviews on PepFinder yet. Trustpilot shows 4.3 from 9 reviews (external; counts towards the PepFinder Score from 10 reviews, weighted by how many there are). PepFinder last read its website on 7 Nov 2026.
PepSource is a research-peptide store based in United Kingdom. We track 46 of its listings across 14 peptides, including MOTS-c, GHK-Cu, SS-31, Wolverine blend, BPC-157 and KLOW blend. It has no customer reviews on PepFinder yet, and Trustpilot shows 4.3 from 9 reviews.
To see whether PepSource is good value, compare its prices per mg with other stores on MOTS-c prices in the UK, GHK-Cu prices in the UK and SS-31 prices in the UK. The “Is PepSource 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
- PepSource
- Location
- United Kingdom
- Domain first seen
- 1 Jul 2026
- First tracked by us
- 24 Sept 2026
- Estimated time active
- 4 months
- support@pepsource.co.uk
Is PepSource 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)
Refund policy published.
Independent testing (Not known)
PepSource states that its products are independently tested, links a certificates-of-analysis or lab-results page. 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 (In place)
Card payment shown on the website, which usually allows a chargeback if an order goes wrong.
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
7 payment methods
Testing and certificates of analysis
PepSource states that its products are independently tested, links a certificates-of-analysis or lab-results page. 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
PepSource states that its products are independently tested, links a certificates-of-analysis or lab-results page. 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
- 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 (46 products)
Every listing we track, with search, price per mg and price history
Listed catalogue and prices
46 products · last checked 7 Nov 2026| Product (as listed) | Price | Per mg | Stock |
|---|---|---|---|
| £55.00 5mg | £11.00 | ||
| £34.00 5mg | — | ||
| £25.00 5mg | £5.00 | ||
| £49.00 10mg | — | ||
| £40.00 10mg | £4.00 | ||
| £23.00 5mg | £4.60 | ||
| £32.00 5mg | — | ||
| £25.00 50mg | £0.50 | ||
| £34.00 50mg | — | ||
| £55.00 50mg | — | ||
| £54.00 100mg | — | ||
| £75.00 100mg | — | ||
| £45.00 100mg | £0.45 | ||
| £40.00 1500mg | £0.03 | ||
| £49.00 1500mg — 3 cartridges | — | ||
| £80.00 80mg | £1.00 | ||
| £110.00 80mg | — | ||
| £84.00 80mg | — | ||
| £25.00 10mg | £2.50 | ||
| £34.00 10mg | — | ||
| £50.00 10mg | — | ||
| £75.00 20mg | — | ||
| £125.00 40mg | — | ||
| £75.00 40mg | £1.88 | ||
| £84.00 40mg | — | ||
| £40.00 500mg | £0.08 | ||
| £65.00 1000mg | £0.07 | ||
| £100.00 1000mg | — | ||
| £50.00 10mg | — | ||
| £34.00 10mg | — | ||
| £25.00 10mg | £2.50 | ||
| £75.00 20mg | — | ||
| £125.00 40mg | — | ||
| £44.00 10mg | — | ||
| £35.00 10mg | £3.50 | ||
| £35.00 10mg | £3.50 | ||
| £44.00 10mg | — | ||
| £57.50 10mg | — | ||
| £50.00 10mg | £5.00 | ||
| £140.00 40mg | £3.50 | ||
| £165.00 40mg | — | ||
| £49.00 10mg | — | ||
| £40.00 10mg | £4.00 | ||
| £80.00 20mg | — | ||
| £69.00 20mg | — | ||
| £60.00 20mg | £3.00 |
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: good
Evidence Coverage: 69%
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, sourced | 44 days ago |
| Shipping destinations | Not known | — |
| Stated delivery time | Not known | — |
| Payment methods | Known, sourced | 44 days ago |
| Customer support channels | Not known | — |
| Refund or returns policy | Known, sourced | 44 days ago |
| Terms of sale | Not known | — |
| Domain age | Known, sourced | 44 days ago |
| Certificates of analysis | Known, sourced | 44 days ago |
| Independent testing | Known, sourced | 44 days ago |
| Testing laboratory | Not known | — |
| Public batch numbers | Not known | — |
| Product catalogue | Known, sourced | 9 hours ago |
| Prices | Known, sourced19 of 46 listed prices can be compared per mg | 9 hours ago |
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 registry's record for pepsource.co.uk gives a registration date of 2026-07-01. | Verified fact | Domain record | 24 Sept 2026 | 44 days ago | Domain registration record (RDAP) |
| Certificates of analysis | The supplier's website links to certificates of analysis or lab results. Documents are not reviewed until an editor checks them. | Supplier-stated | Supplier website | 24 Sept 2026 | 44 days ago | Links a COA / lab results page |
| Testing claim | The supplier states its products are independently tested: “…Independently Tested.…” | Supplier-stated | Supplier website | 24 Sept 2026 | 44 days ago | States independent testing |
| Contact details | The website publishes an email address. | Supplier-stated | Supplier website | 24 Sept 2026 | 44 days ago | Publishes contact details |
| Refund policy | The website links to its refund policy page. | Supplier-stated | Supplier website | 24 Sept 2026 | 44 days ago | Linked policy page |
| Pricing | 46 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 | 9 hours ago | Supplier's public product catalogue |
| Other | The website links to its privacy page. | Supplier-stated | Supplier website | 24 Sept 2026 | 44 days ago | Linked policy page |
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
- 23 Oct 2026CatalogueNo longer listed: GLP2-TIRZ Peptide Pen (40mg)
- 23 Oct 2026CatalogueNew listing: DUO-TIRZ Peptide Pen (40mg)
- 23 Oct 2026CatalogueNew listing: SS-31 Peptide Pen (40mg)
- 23 Oct 2026CatalogueNew listing: MOTS-C Peptide Pen (40mg)
- 19 Oct 2026PriceKLOW Blend (80mg): price up 7%
- 15 Oct 2026CatalogueNew listing: NAD+ Peptide Pen (1000mg)
- 15 Oct 2026CatalogueNew listing: GLP2-TIRZ (40mg)
- 15 Oct 2026CatalogueNew listing: GLP2-TIRZ Peptide Pen (40mg)
- 15 Oct 2026CatalogueNo longer listed: Tirzepatide (40mg)
- 15 Oct 2026CatalogueNo longer listed: Retatrutide (20mg)
- 15 Oct 2026CatalogueNo longer listed: Retatrutide Pen Refill Kit (20mg)
- 15 Oct 2026CatalogueNo longer listed: Retatrutide Peptide Pen (20mg)
- 15 Oct 2026CatalogueNo longer listed: Retatrutide Pen Refill Kit (60mg)
- 15 Oct 2026CatalogueNo longer listed: Retatrutide Peptide Pen (40mg)
- 15 Oct 2026CatalogueNo longer listed: Retatrutide (40mg)
- 15 Oct 2026CatalogueNo longer listed: Retatrutide Peptide Pen (60mg)
- 15 Oct 2026CatalogueNo longer listed: Tirzepatide Peptide Pen (40mg)
- 15 Oct 2026CatalogueNo longer listed: Retatrutide Pen Refill Kit (40mg)
- 15 Oct 2026CatalogueNew listing: SS-31 Peptide Pen (10mg)
- 15 Oct 2026CatalogueNew listing: SS-31 Peptide Pen (20mg)
- 15 Oct 2026CatalogueNew listing: MOTS-C Peptide Pen (10mg)
- 15 Oct 2026CatalogueNew listing: MOTS-C Peptide Pen (20mg)
- 28 Sept 2026ScoreTransparency Score changed from 3.5 to 5.6Scoring methodology updated
- 25 Sept 2026CatalogueNew listing: KLOW Blend Pen Refill Kit (80mg)
- 25 Sept 2026CatalogueNew listing: KLOW Blend Peptide Pen (80mg)
- 25 Sept 2026CatalogueNew listing: Wolverine Stack Peptide Pen (20mg)
- 25 Sept 2026CatalogueNew listing: Wolverine Stack Pen Refill Kit (10mg)
- 25 Sept 2026CatalogueNew listing: Wolverine Stack Pen Refill Kit (20mg)
- 25 Sept 2026CatalogueNew listing: KLOW Blend (80mg)
- 25 Sept 2026CatalogueNew listing: Wolverine Stack (20mg)
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 · 50% 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 — 4.6
- ◐ Links a certificates-of-analysis page (not yet reviewed by us)12.5/25
- ? COAs are batch-specificnot assessed
- ✓ States third-party (independent) testing20/20
- ✕ 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 — 4.2
- ◐ Sourced evidence on record32/40
- ◐ Share of evidence independently verified3.8/30
- ? 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 — 2.4
- ✓ Earliest recorded activity 0.3 years ago
Policy transparency — 6.7
- ? Refund policy is clearnot assessed
- ? Terms of sale are clearnot assessed
- ✓ Refund or returns policy published20/20
- ✕ Terms of sale published0/20
- ✓ Privacy policy published20/20
Compare PepSource with other suppliers
| Supplier | Rating | Customer rating | Prices | Products | |
|---|---|---|---|---|---|
 Peptides UK 4U | 6.2 | No reviews yet | Average | 44 | Visit store |
 BioVanta Research | 6.6 | No reviews yet | 23% above | 93 | Visit store |
 Peptology Labs | 7.1 | No reviews yet | 5% above | 50 | Visit store |
We may earn a commission. How this works
PepSource vs Peptides UK 4UPepSource vs BioVanta ResearchPepSource vs Peptology LabsAll alternatives to PepSource
PepSource: common questions
Is PepSource legit?
We cannot vouch for any supplier, but we can report what the record shows. PepSource meets 3 of the 8 checks we make, with nothing flagged. Each check, and its source, is listed on this page.
Where is PepSource based?
Our records place PepSource in United Kingdom.
Does PepSource publish certificates of analysis?
PepSource states that its products are independently tested, links a certificates-of-analysis or lab-results page. PepFinder has not yet collected or reviewed any of its certificates, so this is the supplier's own claim.
What payment methods does PepSource accept?
The website shows: Visa, Mastercard, American Express, PayPal, Apple Pay, Google Pay, Klarna.
Ready to shop at PepSource?
- Large range with 46 listed products
- Accepts card payments, which carry chargeback protection
We may earn a commission. How this works
Own this business? Claim this profile — free; reply to reviews and keep your details current.
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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