Saskia T.★★★★★
I reordered at 8 months to check nothing had drifted, and it had not — 98.0% then and 98.0% now. The paperwork is genuinely half of what you are paying for.
Sourcing reference
Chinese Peptide Company Co., Ltd.
- Base
- Hangzhou
- Established
- 2001
4.8
★★★★⯨A rating here summarises what members have said about ordering. It is not a safety rating and it cannot be one.
Chinese Peptide Company Co., Ltd., trading as CPC, based in Hangzhou and giving 2001 as its founding year. Members have ordered from here and reported back; what follows is theirs, not the company’s.
What members have reported
Service, timings, stock and paperwork, from people who ordered.
CPC reads, in members' accounts, like a supplier used to talking to laboratories. Questions are answered in the register of somebody who expects the question, and the answers carry method detail rather than reassurance.
Ordering is straightforward. Quotes are returned within a working day, dispatch is quoted at three to five working days, and members ordering the common lines have had them shipped from European or United States stock. Single-vial first orders are ordinary and members have described them being handled exactly like larger ones.
The certificate is one of the more detailed in this set: lot code, method, gradient, column chemistry, wavelength and water content. Members who have asked for the batch record have described a one-email exchange, with the lot code quoted at the top.
The testing record, and its limits
CPC has been trading since 2001 and the independent record for its catalogue reflects that length. Members here have commissioned their own analysis on several lines and have described the results as matching what was published closely enough not to be worth a thread.
The interpretive limit is worth repeating because the certificates are detailed enough to look like more than they are. Chromatographic purity is a proportion of what is present. Quantity, sterility and endotoxin are three further questions, and only the first of them is ever routinely answered.
Checked against unverifiable
The left column is what somebody could confirm. The right column is what nobody can.
Dispatch and warehouses
Stock is held regionally, so an order is sent from within your 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
Can be checked
- That the shop trades at chinesepeptidecompany.net, gives Hangzhou as its base and 2001 as its founding year
- That certificates from here carry the gradient and column chemistry, because members have posted them
- That independent analysis exists for this catalogue from more than one service and across several years
- That members here have ordered small quantities first and been treated no differently for it
Cannot be checked
- Which parts of a long catalogue are made on which line, which is not published by anybody in this market
- The handling history of your specific parcel after dispatch
- Sterility, endotoxin load and residual solvents, which sit outside what a purity certificate reports
Questions to ask before you order
Take these verbatim. The answers, and the non-answers, are informative.
- Please send the lot-specific certificate including the gradient and column.
- Is water content reported for this lot, and by what method?
- Which regional stock will this ship from and what is the dispatch window?
- Can you supply the manufacturing record for this lot code?
Member reports
Published in full, in the words they were written in.
Lucia E.★★★★★
I sent one vial to VendorInvestigate and one to Janoshik because I did not trust myself to read a single result. They agreed with each other. That helped more than I expected. One person, one experience. Yours may be different and that is fine.
Dario Ku.★★★★★
The semaglutide 10 mg went completely clear when I reconstituted it — no cloudiness, nothing floating. Somebody on here told me that is what to look for, and now I am passing it on.
Joaquin B.★★★★★
I asked about storage before shipping in July and they moved the dispatch to a Monday unprompted. They answered kindly and properly, and did not make me feel silly for asking. Their figure and the lab figure were a tenth of a point apart.
Naomi A.★★★★★
I asked Janoshik to test it without telling them where it came from, because I wanted an honest answer. 99.4% against a claimed 99.3%.
Hedda P.★★★★★
I ordered from two lots on purpose so I could compare them, which a member here suggested. They came back a tenth of a point apart. It is not the cheapest and I have made peace with why. The paperwork is genuinely half of what you are paying for.
Joran B.★★★★★
Someone from their side replied on a Sunday, with the batch record attached. I had assumed I would be waiting until Tuesday and fretting the whole weekend. The vials were all within two per cent of each other by weight. One person, one experience. Yours may be different and that is fine.
Joaquin N.★★★★★
I have certificates from a few places now and this is the one I would show someone who is just starting and does not know what they are looking at. The reply came back the same day and it actually answered what I asked.
Teodor Ha.★★★★★
My buddy and I ordered the same line separately to compare notes. Both certificates were complete and both results landed within a tenth of a point. Peptide content was 96.8%, so converting to a working solution was straightforward.
Ahmed S.★★★★★
Tracking updated at every stage, which sounds trivial and was the difference between a calm week and an anxious one. Their figure and the lab figure were a tenth of a point apart. I hope that helps somebody who is where I was six months ago.
Vito R.★★★★★
The certificate had the gradient and the column on it, which meant I could actually read it rather than take a number on trust. That is what I want from documentation.
Marit Dumitru★★★★★
The peptide content is given separately from the purity, so I could do the maths without guessing. My buddy walked me through it and it worked out exactly. It is not the cheapest and I have made peace with why. Take what is useful from this and leave the rest.
Rasmus O.★★★★★
The lot code on the vial matched the paperwork. A member here told me that is the first thing to check, and they were right that it tells you a lot. They told me the storage conditions without my having to ask. I am glad I asked before I ordered, and I would say ask.
Tove B.★★★★★
The cold pack was still solid when I opened it on day 3. I had been worrying about that all week for nothing. Every vial in the box was from the same lot. None of this is medical advice and I am not qualified to give any.
Divya C.★★★★★
Lot CPC-24-190, tested at 99.1%. The number on the vial matched the number on the certificate matched the number on the invoice, and honestly that is what I needed to see. Peptide content was 99.1%, so converting to a working solution was straightforward.
Helga V.★★★★★
I asked a fairly technical question about the method and got an answer written by somebody who clearly does this for laboratories. No sales language at all.
Hana D.★★★★★
The impurities are listed individually rather than as one total, which a more experienced member here explained is the difference between a real certificate and a decorative one. They keep the lines I reorder in the Netherlands, so there is no long wait.
Salma P.★★★★★
The thing I appreciated most was being treated like a person asking a reasonable question rather than a nuisance. It is not the cheapest and I have made peace with why. I am glad I asked before I ordered, and I would say ask.
Lukas K.★★★★★
They emailed to tell me about a 2-day delay before the date passed, rather than leaving me refreshing a tracking page. I cannot tell you how much difference that made. They told me the storage conditions without my having to ask.
Rafael I.★★★★★
I was nervous about ordering at all, so I am writing this for whoever is where I was. I sent the tesamorelin 2 mg to PeptideMeter and it came back 98.9% against a stated 99.1%, and I felt a lot calmer afterwards. The reply came back the same day and it actually answered what I asked. Please still check your own vial. I am one person with one order.
Helga O.★★★★★
I placed 9 orders over 18 months and nothing was ever substituted or quietly swapped after I had paid.
Dagny Ok.★★★★★
My first order was deliberately tiny because I was frightened of getting it wrong. The documentation was complete, the Medutest result was 97.5%, and the next order was not tiny.
Marit A.★★★★★
I want to say clearly that I am not medically trained and this is not advice. What I can say is that the sourcing side of this went smoothly and the paperwork held up. They keep the lines I reorder in Poland, so there is no long wait.
Halima★★★★★
If you are trying to work out whether a certificate is a real one, theirs carries an assigned retention time for the main peak. That was the thing that finally let me stop second-guessing. I hope that helps somebody who is where I was six months ago.
Nils L.★★★★★
They were willing to quote something that other places would not even reply to me about, and it came back clean when I had it checked. The vials were all within two per cent of each other by weight. Please still check your own vial. I am one person with one order.
Nadia S.★★★★★
I weighed 6 of the vials against the label, which I know is a slightly odd thing to do, and they were all within two per cent. It made me feel better about the whole batch.
Talking about CPC in the circles
This page is the reference. The thread is the conversation, and it links back here.
CPC certificates carry the gradient. Here is why that matters
A CPC certificate gives you the gradient and the column chemistry, and I want to explain why that is worth more than another decimal place on the purity figure. Without the method, a percentage is a…
Where CPC sells
So you can read their account against this one.
Chinese Peptide Company Co., Ltd. sells from its own shop. The link below is marked nofollow and sponsored. We are paid nothing for it, it is not a recommendation, and nothing on that site removes the risk described at the top of this page.