Weighed 8 vials from the tirzepatide 10 mg order against label. Every one inside 2% of stated mass. Fill consistency is harder than purity and they have it.
Vendor documentation · maintained record
Zhuhai Kerui Biotechnology Co., Ltd.
Research compound manufacturer trading as KP (keruipeptides.com), based in Zhuhai, China, established 2016. Janoshik-tested and verified by Medutest, PeptideMeter and VendorInvestigate; supplies peptides, SARMs, injectable oils and raw materials with certificates of analysis.
9.7623 community reviews Verified
Dispatch and warehouses
Stock is held regionally, so an order ships from within the buyer’s own country rather than from the manufacturing site.
- Netherlands (Rotterdam) — European Union, 2-4 days
- Germany (Hamburg) — Germany, Austria, Switzerland, 2-4 days
- United Kingdom (London) — United Kingdom & Ireland, 2-3 days
- United States (California) — United States, 2-4 days
- Canada (Toronto) — Canada, 3-5 days
- Australia (Melbourne) — Australia & New Zealand, 3-5 days
Identity
- Legal name
- Zhuhai Kerui Biotechnology Co., Ltd.
- Short code
KP- Also known as
- KP, KP Biotech, Zhuhai Kerui Biotechnology
- Storefront
- keruipeptides.com →
- City
- Zhuhai
- Region
- Zhuhai
- Established
- 2016
- First documented here
- 3 Oct 2024
- Specialty
- Mid-sized catalogue with a responsive technical contact
- Record state
- Verified
The storefront is linked so a reader can verify a supplier directly. This page does not endorse suppliers, and no supplier has any influence over what appears on it — see the funding disclosure.
Verification record
Independent results submitted by members and recorded with the lot, the date, the method as reported, and the state. 4 verified, 0 disputed, 0 unverified.
| Date | Service | Compound | Lot | Method as reported | Result | State |
|---|---|---|---|---|---|---|
| 2026-06-15 | Janoshik | Semaglutide 5 mg | KP-2606-233 | RP-HPLC, 214 nm | 98.8% area | verified |
| 2026-02-11 | Medutest | Tirzepatide 10 mg | KP-2602-118 | RP-HPLC + LC-MS | 98.0% area; identity confirmed | verified |
| 2025-09-18 | PeptideMeter | TB-500 5 mg | KP-2509-604 | RP-HPLC, 220 nm | 97.2% area | verified |
| 2025-04-22 | VendorInvestigate | Documentation audit | n/a | Document review across 8 certificates | One date inconsistency, corrected | verified |
- 2025-04-22, VendorInvestigate: Test date preceded manufacturing date on one certificate; reissued 2025-04-23.
Documentation quality
4/5Assessment
4Records
4Services used
0Disputed
Certificates include method and a chromatogram. On one occasion in 2025 a certificate carried a test date preceding the stated manufacturing date; the supplier corrected and reissued it within a day, and the exchange is on record.
Maintainers' assessment
Verified, with the 2025 date inconsistency retained in the record because we do not delete history. It was a clerical error, corrected promptly, and nothing analytical turned on it.
Community reviews
26 reviews from members with a record on this site. Aggregate rating 9.7 of 10 across 623 reviews.
Reliable on the general catalogue lines. Purity figures cluster tightly and the certificates match the lots.
Domestic dispatch from their stock in the Netherlands. Straightforward, day 3, exactly as quoted.
Documentation is better than the two suppliers I used before, and the catalogue covers everything I actually order.
Their warehouse in the United States had the semaglutide 10 mg in stock and it shipped the same afternoon. Tracking never left the country.
Reordered on the strength of the last one and got an identical result. Repeatability is the product.
Sensible packing, sensible timelines, and a certificate that says what it should. No notes.
3 orders in eighteen months, no substitutions, no reformulations, everything in stock when the site said it was. Boring is the highest compliment I have.
Quoted 3 days, arrived in 2. Tracking updated at every hop from dispatch to door.
Queried the related-substances total on lot KP-25-122; they came back with method, column and detection limit. That depth is rare.
Stock said available, stock was available, and it shipped the same day. That sequence is not as common as it should be.
Support answered on a Sunday, correctly, with the batch record attached. That is well beyond what I expected.
Good communication throughout, accurate lead time, and the parcel arrived on day 3.
The semax 10 mg arrived on day 5 with the cold pack intact and the seal unbroken. Straightforward, exactly as described.
Steady supplier. Medutest results have agreed with their stated figures on every lot I have submitted.
Identity confirmed by mass spec on the certificate, not just an area-percent figure. Both questions answered on one page.
Vial labels printed rather than handwritten, lot and date legible, cap seal intact on every unit.
Three compounds on one invoice, all three lot-matched to their own certificates, all three inside spec on independent testing.
Everything about the order was routine in the best sense — quoted 5 days, arrived in 4.
Solid on the semaglutide 5 mg. Purity where it should be, transit 4 days, paperwork in order.
Asked them to hold an order until I confirmed a lot number and they did, without fuss and without a restocking charge.
Custom synthesis quote came back with a realistic timeline and they beat it. Purity on delivery matched the signed spec.
Costed them per mg against three other suppliers on the same LL-37 5 mg spec. Competitive on price and clearly ahead on documentation.
No customs paperwork, no import wait — it came from their stock in the United Kingdom and arrived day 4.
The certificate for lot KP-25-820 carried method, wavelength, water content and an itemised related-substances table. Complete on the first pass.
Ordered GHRP-2 5 mg twice. Both vials reconstituted cleanly and both matched their certificates.
Where KP sells
Zhuhai Kerui Biotechnology Co., Ltd. sells from its own storefront. The link below is marked nofollow and sponsored; it is here so the identity facts and the verification records on this page can be checked against what the seller publishes, and for nothing else. This site is paid nothing for it.
Visit KP at keruipeptides.com →
Whatever a storefront claims, the lot on the vial has to match the lot on the certificate. That check is yours and nobody else can do it for you.
Discussed in
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|---|---|---|---|---|
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+64 | 72 | 51k | 1mo |
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+14 | 18 | 17k | 13mo |
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Why this community will not facilitate a group purchase
Asking directly, because I could not find a straight answer: Why this community will not facilitate a group purchase A logistics question, since the answers here are usually better than anywhere else I have…
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2 | 40k | 3mo | |
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Second pass at: What to keep a record of at the point of payment
Second pass at: What to keep a record of at the point of payment — setting out what I have, and where I think it stops being reliable. A logistics question, since the answers here are usually better than…
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+14 | 18 | 1.9k | 4mo |
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Follow-up: Why this community will not facilitate a group purchase
Why this community will not facilitate a group purchase I have a specific reason for asking rather than idle curiosity, and the context is below. A logistics question, since the answers here are usually…
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2 | 19k | 18mo | |
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Identical chromatograms across two different lots
Identical chromatograms across two different lots Writing it up because I had to work it out twice and would rather nobody else did. A logistics question, since the answers here are usually better than…
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+80 | 87 | 58k | 18mo |
Maintenance
Maintainers: KLindqvist, f.demir. Next review due 14 October 2026.
To add a record, file a structured report in vendor reports with the compound, lot, service, method and result. Reports missing any of those are moved to the discussion rather than the record. Allegations without documentation are hidden under R6 and the hiding is logged.
On what each service's report establishes: Janoshik Analytical · Medutest · PeptideMeter · VendorInvestigate