PepBiotics Review
Scored 2.23/10 on the published Peptide Source Review formula: lab credibility, shipping, pricing, operating history, and transparency.
- COAs on file
- 0
COAs on file
- Confirmed at the lab
- 0
Confirmed at the lab
- Products
- 15
Products
- Labs
- 0
Labs
2.23/ 10
- Lab credibility and recency55%0.0 (show how this was scored)
- Shipping and refund20%9.0 (show how this was scored)
- Pricing15%1.9 (show how this was scored)
- Operating history5%0.9 (show how this was scored)
- Business transparency5%2.0 (show how this was scored)
Weights are fixed for every vendor. Select a row to see how it was scored.
Testing gate applies (limit 6.50); this score is already below it
Third-party testing not established. The gate records that testing could not be verified; it is not a finding of a quality or safety problem.
Is PepBiotics legit?
PepBiotics scores 2.23 out of 10 (Poor, #97 of 100) as of November 3, 2026 and does not meet our testing gate: none of the 15 products we score carries a certificate. Its strongest area is shipping and refunds (9.0/10) and its weakest is lab testing (0.0/10); its operating history on record covers about three months.
On lab evidence, the heaviest-weighted factor, PepBiotics has no third-party testing we could independently verify. The testing gate applies because that testing could not be independently verified (Third-party testing not established); its limit for PepBiotics is 6.50, and this score is already below it. Its lowest price per milligram in our data is on GHK-Cu (see the table below).
How this score was calculated
Every point below follows the published tables in our methodology, with the policy wording we scored and a link to where we read it. Evidence last checked October 22, 2026. Lab credibility is worked product by product from the certificates on file.
Lab credibility0.0/10
Each carried product (lab supplies excluded) is scored from the certificate on file for it, on the published lab rubric: 3 for a published certificate, then points for the laboratory, the verification key, the tests on the certificate and its purity, held to 0 to 10. A certificate that is self-issued, names no laboratory, or comes from a laboratory whose independence is not established scores a flat 2.0; a product with no certificate, a certificate the laboratory’s own record fails, or a posted copy that differs materially from the laboratory’s copy scores 0. Calculated on , the day this page was built; the date each certificate was tested is shown on its row.
- GHK-Cu0.0
No certificate on file for this product: scores 0, counted fully because it is one of the core products.
- Tirzepatide0.0
No certificate on file for this product: scores 0, counted fully because it is one of the core products.
- CJC-12950.0
No certificate on file for this product: scores 0, counted at 0.5 weight because it is not one of the core products.
- TB-5000.0
No certificate on file for this product: scores 0, counted fully because it is one of the core products.
- Ipamorelin0.0
No certificate on file for this product: scores 0, counted fully because it is one of the core products.
- Retatrutide0.0
No certificate on file for this product: scores 0, counted fully because it is one of the core products.
- Semaglutide0.0
No certificate on file for this product: scores 0, counted at 0.5 weight because it is not one of the core products.
- BPC-1570.0
No certificate on file for this product: scores 0, counted fully because it is one of the core products.
- Selank0.0
No certificate on file for this product: scores 0, counted fully because it is one of the core products.
- Tesamorelin0.0
No certificate on file for this product: scores 0, counted fully because it is one of the core products.
- SS-310.0
No certificate on file for this product: scores 0, counted at 0.5 weight because it is not one of the core products.
No certificate on file for this product: scores 0, counted fully because it is one of the core products.
- MOTS-c0.0
No certificate on file for this product: scores 0, counted fully because it is one of the core products.
- KPV0.0
No certificate on file for this product: scores 0, counted at 0.5 weight because it is not one of the core products.
- Semax0.0
No certificate on file for this product: scores 0, counted fully because it is one of the core products.
Weighted mean of 15 products (4 non-core products without a certificate counted at half weight): 0.0 ÷ 13.0 = 0.000.
No adjustments.
0.000 = 0.000, rounded to 0.1: 0.0/10.
Testing gate: 0 of 15 products have a certificate from a directory laboratory (not tier D, not self-issued) with the key confirmed at the laboratory. That is fewer than half, so the testing cap applies (see the methodology).
Shipping and refunds9.0/10
- +2
Returns and refunds
Opened research vials are not returnable. Contact support before returning an unopened item so we can confirm eligibility
- +2
Lost or damaged parcels
Lost or damaged? We reship free... we send a replacement at no cost
- +1.5
Dispatch time
orders are dispatched within 1-2 business days, with tracking
- +1
Tracking on all orders
dispatched within 1-2 business days, with tracking
- +1.5
Payment you can dispute
Secure SSL checkout · major cards & wallets accepted (VISA, AMEX marks)
- +1
Shipping rates published
Standard shipping: [price] per order... Free Standard shipping qualifies from [price]
Total +9: 9.0/10.
Pricing1.9/10
We compared PepBiotics’s current single-vial prices on 15 products, each matched to the same product and milligrams per vial, with the median price of the other vendors. Its typical price (the median ratio across those products) is 81% above the market median (ratio 1.81), which the published scale maps to 1.9/10. checked
Operating history0.9/10
Counted from July 9, 2026, the earliest dated evidence of this business operating: 3.4 months as of October 22, 2026, which the published table maps to 0.9/10.
Domain pepbiotics.com registered 2026-07-09 (RDAP/registry WHOIS), never shown parked or for sale under this registration. Wayback captures of pepbiotics.com in 2018-2019 belong to an earlier registration (current registration 2026-07-09); not this business. Nothing earlier found; domain date kept.
- 2026-07-09 Domain registration: registration rdap.org (opens in new tab)
Transparency2.0/10
- 0
- +1
Business address
PepBiotics, Unit A, 82 James Carter Road, Mildenhall, Suffolk IP28 7DE, United Kingdom
Address checked: virtual office.
- 0
- 0
- +1
Dated terms with a governing law
policies dated (shipping 'Last updated: October 11, 2026'); terms 'governed by the laws of the State of Wisconsin'
- 0
Testing lab named, certificates published
batch library 'currently contains 0 visible batch records'; about page names 'Aegis Bioanalytical Laboratories' but nothing is published
Total +2: 2.0/10.
Shop PepBiotics
- Rated 2.23/10 · Poor
- Best value: GHK-Cu at $1.57/mg
Audit history and why the rating changed
We re-audit vendors against their live COAs and site. Here is what most recently moved this rating, and why.
See the full score history and chart
- Most recent audit · 2.28to2.23
Market medians updated on 3 November 2026 after the NextGen Peps re-check added priced listings: pricing 2.2 to 1.9.
- Audit · 2.25to2.28
Market medians updated after Stack Research was added pricing 2.0 to 2.2.
- Audit · 2.28to2.25
Pricing recomputed on 26 October 2026: listings added for a newly reviewed vendor (Lotus Peptide) moved the market median for the same products: pricing 2.2 to 2.0.
Earlier audits (4)
- Audit · 2.08to2.28
Re-scored on 22 October 2026 under the published rulebook, which now gives one rule for each judgement call and applies it to every vendor: shipping and refunds 8.0 to 9.0.
- Audit · 1.57to2.08
Re-scored on 22 October 2026 under our published rubric for shipping, pricing, operating history and transparency, applied to every vendor the same day: prices re-read from the vendor's site and matched by milligrams per vial, operating history from the earliest dated evidence of the business, and policies scored item by item. shipping and refunds 5.5 to 8.0, pricing 2.5 to 2.2, operating history 0.5 to 0.9, transparency 1.5 to 2.0.
- Audit · 1.85to1.57
Lab 0.5 to 0. Every published certificate is a self-declared specimen rather than a laboratory report, so no product we list has a certificate, and under our published rule the lab score is zero rather than a small floor.
- Audit · Initial audit
lab 0.5 / shipping 5.5 / pricing 2.5 / tenure 0.5 / transparency 1.5.
Editor’s notes
When we reviewed it on 1 October 2026, PepBiotics published what looked like the most complete testing library of any vendor we have reviewed, 186 certificates with a batch-lookup tool and a page declaring that every batch is third-party tested and every result published before it ships. On 22 October 2026 the batch library stated that it held no visible batch records. We downloaded and read all 186. Every single one carries a line at the foot stating that it is a specimen, that the data shown is illustrative pending the real laboratory report, and that the values are representative of a release specification rather than an actual analysis. None of that appears anywhere on the page that advertises the library. Each certificate also prints a verification address, localhost:3060/verify, which does not lead to any public website, and the header carries a different company name from the brand. The laboratory named on all 186, said to be ISO/IEC 17025 accredited in San Diego, has no internet registration under either spelling of its name. We found no evidence that any product sold here has been independently tested. Prices are high for the quantities offered, and when we checked prices on 7 October 2026, a fifty percent discount was applied automatically at checkout, so the listed prices were not the prices charged. Prices are charged in euros. We were approached to become an affiliate before any review existed. We have declined, and we are not listing this vendor as a place to buy from.
PepBiotics COAs and lab test results
One row per product: the certificate on file and how the lab rule reads it, the laboratory that issued it and its tier, the date it was tested, the purity it reports, and the lowest price per milligram we recorded (per IU or mL where a product is sold that way).
- Purity
- —
- Price per mg
- $1.57$78.74 / 50mg
- Purity
- —
- Price per mg
- $11.25$56.24 / 5mg
- Purity
- —
- Price per mg
- $28.12$56.24 / 2mg
- Purity
- —
- Price per mg
- $28.12$56.24 / 2mg
- Purity
- —
- Price per mg
- $28.12$56.24 / 2mg
- Purity
- —
- Price per mg
- $36.00$180.01 / 5mg
- Purity
- —
- Price per mg
- $11.25$56.24 / 5mg
- Purity
- —
- Price per mg
- $28.12$56.24 / 2mg
- Purity
- —
- Price per mg
- $13.05$65.24 / 5mg
- Purity
- —
- Price per mg
- $24.75$123.75 / 5mg
- Purity
- —
- Price per mg
- $11.47$114.75 / 10mg
- Purity
- —
- Price per mg
- $12.38$247.52 / 20mgbest of 2 sizes
- Purity
- —
- Price per mg
- $7.42$74.24 / 10mg
- Purity
- —
- Price per mg
- $11.25$56.24 / 5mg
- Purity
- —
- Price per mg
- $19.80$98.99 / 5mg
Learn more about what PepBiotics carries
Rated higher than PepBiotics, with a reader code
PepBiotics is not one of our affiliate partners, so we have no code for it. These partners score above it under the same published rules, pass our testing gate, and give readers a discount.
Affiliate links: we may earn a commission if you buy. It never changes a score or rank.
7.73/10 · Strong · carries 14 of the same products
6.98/10 · Fair · carries 15 of the same products
5.95/10 · Fair · carries 15 of the same products
PepBiotics: Frequently Asked Questions
Is PepBiotics legit?
PepBiotics scores 2.23 out of 10 (Poor, #97 of 100) as of November 3, 2026 and does not meet our testing gate: none of the 15 products we score carries a certificate. Its strongest area is shipping and refunds (9.0/10) and its weakest is lab testing (0.0/10); its operating history on record covers about three months.
Is there a PepBiotics promo code, coupon code, or discount code?
We do not have a verified PepBiotics promo code or coupon code right now. When PepBiotics runs a sale or issues a discount code, we post it here and on our promos page, so bookmark this page for the latest PepBiotics discount.
Does PepBiotics use third-party lab testing?
Not to our verification standard. Fewer than half of this vendor's scored products have a certificate from an independent laboratory in our directory (not tier D) whose verification key we confirmed at that laboratory, so the testing gate applies. This records what we could verify; it is not a finding of a quality or safety problem.
Where can I see PepBiotics' COAs?
We have no PepBiotics certificate of analysis on file that we could verify at audit time for any of the 15 products we track. The "PepBiotics COAs and lab test results" table on this page shows the status of each product, and it updates when PepBiotics publishes a certificate we can check.
What peptides does PepBiotics carry?
PepBiotics carries GHK-Cu, Tirzepatide, CJC-1295, TB-500, Ipamorelin, Retatrutide, Semaglutide, BPC-157, and 7 more. Current per-milligram pricing, COA links, and verification keys for each are in the comparison table on this page.
Is the PepBiotics review on Peptide Source Review affected by affiliate status?
No. All affiliate relationships are publicly disclosed and never change a vendor's score, rank, or gate status. Our scoring formula is published in full and applied identically to every vendor.
Want to understand how this score was built?
Read the full methodology or the editorial integrity policy.
PepBiotics2.23Poor