CPC — member reviews
93% from 1,092 member reports. 26 are published in full below; the rating aggregates all of them. Reviews without an order date or a testable claim are not counted.
This community's number, not a fleet-wide one. Independent groups scoring the same vendor land within a few tenths of each other, and where they diverge it is usually because one group weights logistics and another weights purity consistency.
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.
What a useful review looks like
Order date, what was ordered, what arrived, how long it took, and whether anything was independently tested. That is it. "Great vendor, fast shipping, A+++" is worth nothing and gets removed; a review naming a lot, a document and a turnaround is worth more than ten enthusiastic ones.
Why these twenty and not two hundred
A source page is opened when enough members have ordered and paid for independent testing that the log says something specific. Nearly two hundred other names get a row in the table at the foot of the directory with a band, a report count and a written note — no page, no score, no link. The contrast is the point: the twenty are where the evidence is, not where the enthusiasm is.
Where CPC sells
Chinese Peptide Company Co., Ltd. sells from its own storefront. The link below is marked nofollow and sponsored and is here so you can read what they say about themselves against what this page says about them. GLP Research Hub is paid nothing for it, and a link is not a recommendation.
Visit CPC at chinesepeptidecompany.net →
A good record predicts your batch. It does not guarantee it, and no storefront can. Check the lot on the vial against the lot on the certificate.