CPC
Chinese Peptide Company Co., Ltd.
Hangzhou · China · est. 2001 · source page added 7 Oct 2023
Buy direct from CPC at chinesepeptidecompany.net →
Their storefront, not ours. Marked nofollow and sponsored, and nobody here is paid for it.
Hangzhou, established 2001, and one of very few names here whose claimed history survives a check against the company registry. It reads like a contract synthesis house that also sells small quantities rather than a shop presenting itself as a factory. Method questions come back in technical language, and the batch numbering has been sequential and internally consistent across nine documented orders.
- Legal name
- Chinese Peptide Company Co., Ltd.
- Short code
- CPC
- Also known as
- CPC, CPC Biotech, Chinese Peptide Company
- Shop domain
- chinesepeptidecompany.net →
- City
- Hangzhou
- Established
- 2001
- Community rating
- 93%
- Independent tests logged
- 5
Regional stock, so orders ship inside the buyer’s own country.
- 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
- Establishment date and legal entity both check out against filings
- Consistent 98%+ across every compound in the log
- Answers method questions in technical terms rather than marketing ones
- Plan around the Chinese New Year period — ask for the dispatch window in writing and they will give you a realistic one
- Ask for the batch record: the numbering is sequential and they will show you where your lot sits in it
- For summer shipments ask what packaging is used on your lane, and which lines are in regional stock
| Date | Service | Compound | Batch | Claimed | Result |
|---|---|---|---|---|---|
| 2026-06-04 | Medutest | Tirzepatide 10mg | CPC-2606 | 98.5% | 98.6% |
| 2026-01-19 | Janoshik | Semaglutide 5mg | CPC-2601 | 99.0% | 99.3% |
| 2025-08-27 | PeptideMeter | BPC-157 5mg | CPC-2508 | 98.0% | 98.5% |
| 2025-03-11 | Janoshik | Retatrutide 5mg | CPC-2503 | 98.0% | 98.1% |
| 2024-09-05 | VendorInvestigate | Semaglutide 10mg | CPC-2409 | 99.0% | 99.1% |
| From | To | Carrier | Days |
|---|---|---|---|
| Hangzhou | Ireland | DHL | 9–11 |
| Hangzhou | US East | EMS | 9–14 |
- 1[Question] related substances — what am I missing herec/coa · 4.5k points · 22 comments
- 2reading testing threads from 2024 and half of it aged badlyc/vendorvetting · 4.1k points · 43 comments
- 3[Lab] CPC cagri — Janoshik came back 98.1% against a claimed 97.5%c/hplc · 4k points · 20 comments
- 4reading below spec threads from 2024 and half of it aged badlyc/labresults · 3.6k points · 37 comments
- 5[Vendor] CPC — 2001 establishment date checks out against the company registryc/vendorvetting · 1.8k points · 25 comments
- 6[Explainer] the four things a COA must have or it is decorativec/coa · 1.7k points · 23 comments
- 7[Lab] CPC cagri — Janoshik came back 98.4% against a claimed 97.5%c/cagrilintide · 1.4k points · 54 comments
- 8[Lab] CPC orfo — Janoshik came back 98.3% against a claimed 97.5%c/orforglipron · 968 points · 31 comments
- 9[Lab] 24th independent test on CPC — 97.6% on a claimed 97.0%, and the trend is the interesting partc/hplc · 489 points · 24 comments
- 10[Vendor] CPC vs MKM on the same compound, same month — both cleared 97.5%c/semaglutide · 401 points · 19 comments
- 11purity — 20 things I got wrong before I got it rightc/labresults · 372 points · 21 comments
- 12is 96.8% area% actually fine or am i being sold a rounding errorc/coa · 345 points · 20 comments
first order was small on purpose. Medutest said 97.1%. second order was not small. mass variation across the box was under 2%.
split the order across two lots to compare. came back within 0.1 of each other. this is one order not a dataset.
their raw tested 97.5% against a reseller vial of the same thing at 97.5%. going direct is not a vibe, it is a number. customs paperwork right first time which is why it was fast.
the related substances table is itemised. actual named impurities. not "total 0.4%" and a shrug. invoice and vial and cert all agree on the lot.
the thing that sold me is peptide content being listed separately from purity. nobody does that and everybody should. they flagged the delay in advance instead of after. defaulting to them until something changes.
ordered thymosin beta-4 5 mg, sent it to PeptideMeter, came back 98.9% on a stated 98.7%. good enough for me.
I asked whether the counter-ion was acetate or trifluoroacetate and got a straight answer and got an actual answer, not a copy-paste.
ordered semaglutide 10 mg, and the lot code on the vial matched the paperwork exactly. Medutest put it at 99.2% against the claimed 99.0%. paperwork is half of what you are paying for.
day 5 from the Netherlands warehouse, tracking updated every single hop. customs paperwork right first time which is why it was fast.
I have certificates from about 11 suppliers and theirs is the one I would hand to someone as an example. invoice and vial and cert all agree on the lot.
they told me about a 3 day delay before it happened. before. that is the bar and almost nobody clears it. would buy again. have bought again.
stock said in stock. it was actually in stock. shipped same day. wild. lines I actually reorder are the ones they keep in Spain.
custom synth quote came back realistic and then they beat the date by 3 days. if the next one holds I will stop testing every lot.
12th order, zero drama. that is genuinely all I have to say. catalogue is actually deep, not deep-looking.
reconstituted the tirzepatide 15 mg and it went clear instantly. no haze. you can tell straight away when it has been done properly.
quoted 5 days. arrived 5 days. this is the whole review. invoice and vial and cert all agree on the lot.
the certificate is the same layout every time, which makes comparing lots trivial. VendorInvestigate put it at 97.2% against the claimed 97.0%. defaulting to them until something changes.
certificate for lot CPC-26-384 was complete first time. no email chain. no "we will look into it".
sent one to Medutest and one to PeptideMeter because I did not believe the first result. both agreed. fine, I believe it. the difference between their number and the lab number is smaller than method noise. defaulting to them until something changes.
been buying DSIP 5 mg from them for 6 months. nothing has changed, which is the point. paperwork is half of what you are paying for.
packing was a tamper strip that had to be cut rather than peeled. someone in that warehouse cares. not sponsored, not affiliated, just kept the receipts.
5 lots over 15 months, all inside a one-point band. the lot-specific document, not the catalogue one, which is the distinction that matters. test your own vial regardless. always.
blind submitted the LL-37 5 mg to VendorInvestigate, did not say whose it was. 99.3% vs 99.1% claimed. n=1 and I am saying so.
5 orders, 24 months, no substitutions and nothing quietly swapped after payment. boring supplier. highest compliment I have.
support replied on a sunday with the batch record attached. on a sunday. the difference between their number and the lab number is smaller than method noise. paperwork is half of what you are paying for.
the lot code on the vial matched the paperwork. sounds like nothing. it predicts everything. catalogue is actually deep, not deep-looking.
Chinese Peptide Company Co., Ltd. sells from its own storefront. Read what they say about themselves against the log above, then decide.
Go to the CPC store — chinesepeptidecompany.net →
Check the lot on the vial against the lot on the certificate when it arrives. A good record predicts your batch; it cannot guarantee it, and no storefront can.