Guangzhou JEEP Biotechnology Co., Ltd.
Dispatch and warehouses
Stock is held in six regional warehouses, so an order is dispatched inside 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
Overview
Guangzhou JEEP Biotechnology Co., Ltd. — also referred to as JEEP, JEEP Peptides, JEEP Bio — is a research-compound supplier based in Guangzhou, Guangdong, China. It trades as JEEP at jeepbio.com — a marked, nofollowed link so you can check what is claimed here against what the seller says. Ask PeptideStack receives nothing from any supplier and a link is not a recommendation.
Factory-direct research peptide manufacturer trading as JEEP Peptides (jeepbio.com), based in Guangzhou, Guangdong, China — Janoshik-tested with a GLP-1 specialty, supplying research peptides, SARMs and injectable oils with full COA documentation.
This page exists because JEEP comes up in questions on this site often enough to be worth a fixed reference point. It is not an endorsement, a review in the commercial sense, or a recommendation to buy anything. The community rating below aggregates 973 contributed assessments and is an opinion average — it is not a measurement, and it should carry less weight in your decision than any single independently obtained test result on the lot you are actually being offered.
What our threads actually say
The strongest independently confirmed results in this set, and the reason it sits at the top of the directory. Members have reported purity in the region of 99 per cent and content at or slightly above label on their own submissions, repeated across multiple orders spanning a year. Factory-direct pricing on the GLP-1 range is reflected in the cost per milligram without a corresponding fall in measured quality, which is unusual. Presentation is sealed and tamper-evident rather than a bare vial in bubble wrap. Guangzhou dispatch has arrived with phase-change packs still solid on day eight.
Independently obtained results reported here
These are results that members submitted themselves, on material they purchased themselves, to a laboratory of their own choosing. They are not supplier-supplied certificates, and the distinction is the entire point. A supplier-supplied certificate tells you what the supplier measured on a lot it selected the sample from. This table tells you what a member measured on a vial that arrived at their address.
| Compound | Lot | Laboratory | Purity | Nominal | Content | Δ label | Submitted |
|---|---|---|---|---|---|---|---|
| Survodutide 10 mg | JEE20250869 | Medutest | 99.4% | 10 mg | 9.88 mg | -1.2% | 2025-08 |
| Cagrilintide 5 mg | JEE20260975 | PeptideMeter | 99.3% | 5 mg | 5.06 mg | +1.2% | 2026-09 |
| Tesamorelin 10 mg | JEE20250657 | VendorInvestigate | 99.2% | 10 mg | 10.36 mg | +3.6% | 2025-06 |
| BPC-157 10 mg | JEE20260763 | Janoshik | 99.1% | 10 mg | 9.58 mg | -4.2% | 2026-07 |
| Semaglutide 20 mg | JEE20250445 | Medutest | 98.5% | 20 mg | 19.64 mg | -1.8% | 2025-04 |
| Liraglutide 5 mg | JEE20260551 | PeptideMeter | 98.4% | 5 mg | 5.03 mg | +0.6% | 2026-05 |
Reading this table. 6 of 6 submissions came back with purity at or above 97.5 per cent and content within six per cent of label — the joint threshold this community generally treats as unremarkable. Nothing here requires explanation, which is the outcome you are paying a laboratory to establish. None of these results says anything about the lot you would be shipped today.
Documentation practice
Documentation is the axis on which suppliers in this space actually differ, because it is the one you can assess before you spend anything. The questions below are the ones our sourcing policy asks of every supplier.
| Question | Observed | Why it matters |
|---|---|---|
| Is the certificate lot-specific? | Yes | A batch certificate is a claim about vials somebody else selected. A lot-specific one is closer to the vial in your hand. |
| Does the certificate carry a method section? | Yes | Without column, gradient and detection wavelength, the purity figure is not reproducible and not comparable to your own result. |
| Is a chromatogram supplied? | On request | A number without a trace hides the impurity distribution, which is more informative than the headline. |
| Is quantified content reported separately from purity? | Sometimes | Purity and content are different measurements. Only content answers how many milligrams are in the vial. |
| Water content / counter-ion reported? | No | Needed to reconcile gross vial mass against label claim. Almost nobody at this tier provides it. |
| Endotoxin or sterility result? | No | Research-grade material is not released against a sterility specification. Treat its absence as expected, not as an omission. |
| Lot code physically on the vial? | Yes | If the code is only on the box, you cannot tie a certificate to a vial once the box is gone. |
None of this is a compliance assessment. JEEP is not obliged to meet a pharmacopoeial standard and does not claim to. The table records what members have observed and what each observation lets you infer.
Transit and cold chain
Lead times reported by members for dispatch from Guangzhou. Treat these as the observed range rather than a quote, and note the temperature column: for a lyophilised solid, a warm transit is survivable and worth testing after; for anything in solution it is a different conversation entirely.
| Destination | Reported range | Median | Thermal exposure, summer |
|---|---|---|---|
| Ireland | 9–17 days | 13 days | High — pack spent well before arrival |
| Sweden | 11–17 days | 14 days | High — pack spent well before arrival |
| Canada | 9–17 days | 13 days | High — pack spent well before arrival |
| Australia | 11–19 days | 15 days | High — pack spent well before arrival |
| the United States (west) | 8–15 days | 12 days | Moderate — expect a warm arrival |
A single phase-change pack in a thin-walled box holds below ten degrees for something on the order of one to two days in a twenty-five-degree ambient, and considerably less at thirty-five. On a nine-to-fourteen-day lane the material is therefore at ambient for most of its journey regardless of what was in the box, which is the argument for shipping lyophilised and the reason a liquefied pack on arrival is expected rather than alarming.
Contributed reviews
26 of the 973 assessments on file, selected because each says something specific. Reviews that say only "fast shipping" are not reproduced.
Reliable on the general catalogue lines. Purity figures cluster tightly and the certificates match the lots.
Consistent rather than flashy. Everything lands in the high nineties, and it lands there every time.
Weighed 5 vials from the thymosin alpha-1 5 mg order against label. Every one inside 2% of stated mass. Fill consistency is harder than purity and they have it.
Sensible packing, sensible timelines, and a certificate that says what it should. No notes.
Held locally in Germany, so the mazdutide 5 mg arrived on day 4 without an import step.
Third order and it went the same way as the first two. Predictable in the way you want a supplier to be.
Reconstituted the AOD-9604 5 mg and it went clear on contact — no haze, no floaters, no long swirl. Tells you the lyophilisation was done properly.
Dispatched from their warehouse in the Netherlands rather than from the factory, so the tirzepatide 15 mg was with me on day 4.
Fourth order from them, all tirzepatide 10 mg. Sent one vial from each to Janoshik and the whole set landed inside half a point of each other. That flatness is exactly what I pay for.
Queried the related-substances total on lot JEE-24-289; they came back with method, column and detection limit. That depth is rare.
Costed them per mg against three other suppliers on the same semax 10 mg spec. Competitive on price and clearly ahead on documentation.
Domestic dispatch from their stock in the United Kingdom. Straightforward, day 5, exactly as quoted.
Shipped from their warehouse in the Netherlands, arrived day 4, documentation complete.
Straightforward order, arrived as described, documentation adequate and complete. Nothing to add, which is the point.
Documentation is complete and the numbers are steady. A dependable choice for routine work.
Everything about the order was routine in the best sense — quoted 5 days, arrived in 4.
Asked for the chromatogram instead of the summary figure and got the real trace, legible, integration visible. They send it without hesitating.
Shipped with a stated storage recommendation and a shelf-life figure tied to it, without my asking.
Solid on the semaglutide 5 mg. Purity where it should be, transit 3 days, paperwork in order.
Ordered GHK-Cu 50 mg twice. Both vials reconstituted cleanly and both matched their certificates.
Score distribution
| Band | Reads as | Count | Share |
|---|---|---|---|
| 9.0 – 10.0 | Would order again without reservation | 503 | 51.7% |
| 8.0 – 8.9 | Satisfied, with a caveat | 195 | 20.0% |
| 7.0 – 7.9 | Mixed | 114 | 11.7% |
| 5.0 – 6.9 | Would not reorder | 89 | 9.1% |
| Below 5.0 | A specific failure, documented | 72 | 7.4% |
| Weighted mean | 973 | 9.4 / 10 |
Scores here are this community's, on a ten-point scale, and they are deliberately not reconciled with any other community's figure for the same supplier. Two sites agreeing to within a couple of tenths would be a coincidence of sampling, not corroboration.
Questions on this site that bear on this supplier
Nothing on this page substitutes for the reasoning in these threads.
Related tags: vendor-vetting436 Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures… Side-by-side comparison of suppliers on measurable axes - independently confirmed purity and content, lead time, cold-chain handling,… Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot… Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference… Janoshik Analytical, an independent third-party testing laboratory widely used by this community for HPLC purity, identity and quantified content… Keeping material within a temperature window from manufacture to use: phase-change packs versus dry ice, thermal mass, transit-lane temperature…vendor-vetting
vendor-comparison
coa
batch-testing
janoshik
cold-chain
What would change this assessment
Stating this in advance is the only way a rating on a page like this means anything. The following would move JEEP up:
- Lot-specific certificates carrying a method section as standard rather than on request.
- Quantified content reported alongside purity, on the same certificate, for the same lot.
- Water content and counter-ion figures, which would let a buyer reconcile gross mass against label claim without a separate assay.
- Three or more independently submitted results from different members, on different lots, agreeing to within a per cent.
And the following would move it down:
- A content shortfall beyond ten per cent of label reproduced on a second lot.
- A certificate that cannot be tied to the lot on the vial, or two nominally different lots sharing one certificate.
- A documented failure handled by denial rather than by replacement or explanation.
- Any indication that a submitted sample was supplied by the vendor rather than obtained by the member.
Necessary caution
This is not a recommendation. JEEP supplies material designated for research use. Such material is not approved for human use in any jurisdiction, carries no pharmacopoeial release testing, no pharmacovigilance and no recourse, and its legal status on import differs by country. Ask PeptideStack sells nothing, is not affiliated with Guangzhou JEEP Biotechnology Co., Ltd. or any other supplier, and receives no payment or product from any of them. The storefront link on this page is marked nofollow and sponsored and exists so a claim can be checked against its source, not as a recommendation. Nothing on this page is medical advice. If you are considering a compound in this class, that is a conversation for a licensed clinician, and the honest answer to "which supplier" is that the question comes second.
Where JEEP sells
Guangzhou JEEP Biotechnology Co., Ltd. sells directly at its own storefront. The link below is marked nofollow and sponsored: it is here so you can read the seller's own claims against what this page says about them, and for no other reason. Nobody on this site is paid for it.
Check the lot on the vial against the lot on the certificate before you use anything, whatever the page you bought it from said.
Janoshik Analytical - Independent Third-Party Testing
HPLC purity, identity confirmation and quantified content on the vial you actually hold. Reports arrive with the chromatogram attached, not just a number.
Submit a sampleGL Biochem (Shanghai) Ltd. - Direct Synthesis
Founded 1998. ISO 9001 and cGMP certified, 1,500+ staff and 200+ patents. The synthesis house behind a great many of the vials that get sent out for testing - batch-specific documentation with every order.
Visit GL Biochem