KP — member reviews
94% from 989 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.
reordered at 20 months to check for drift. 96.9% then, 96.9% now. mass variation across the box was under 2%.
weighed 3 vials against label out of curiosity. all within 2%. fill consistency is underrated. not sponsored, not affiliated, just kept the receipts.
certificate for lot KP-26-498 was complete first time. no email chain. no "we will look into it".
3 orders, 10 months, no substitutions and nothing quietly swapped after payment. they gave the storage condition the stability statement was written against without being asked.
they told me about a 2 day delay before it happened. before. that is the bar and almost nobody clears it. defaulting to them until something changes.
the analysis date on the certificate was three weeks before dispatch. lot KP-26-641 was fine on test and the trace was clean at the baseline. solid. that is it.
their certificate has water content by Karl Fischer. I did not expect that and I am not over it. solid. that is it. solid.
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. no notes.
ordered MOTS-c 10 mg, sent it to VendorInvestigate, came back 98.4% on a stated 98.3%. good enough for me. happy. moving on.
cold pack was still solid on arrival day 4. in Germany. in summer. boring supplier. highest compliment I have.
ordered cagrilintide 5 mg, and the lot code on the vial matched the paperwork exactly. lot KP-26-336 came back 99.0% on a stated 98.5%. this is one order, not a dataset.
bought DSIP 5 mg expecting to have a complaint. do not have one. annoying.
shipped out of Poland, landed day 6. no customs, no waiting, no chasing. mass variation across the box was under 2%. n=1 and I am saying so.
quoted 5 days. arrived 5 days. this is the whole review. if the next one holds I will stop testing every lot.
first order was small on purpose. Janoshik said 97.6%. second order was not small. genuinely nothing to complain about.
sent one to Janoshik and one to VendorInvestigate because I did not believe the first result. both agreed. fine, I believe it. stated purity and independent purity landed a tenth apart. would buy again. have bought again.
stock said in stock. it was actually in stock. shipped same day. wild. they flagged the delay in advance instead of after. solid. that is it. solid.
6th order, zero drama. that is genuinely all I have to say. research use only, obviously.
they will quote lines nobody else will even respond about, and it came back clean. mass variation across the box was under 2%.
asked about counter-ion and got acetate vs TFA answered properly instead of being ignored. peptide content 97.7% so converting to a working mass was trivial. paperwork is half of what you are paying for.
support replied on a sunday with the batch record attached. on a sunday.
the related substances table is itemised rather than a single total. support answered on the same working day with the document attached. would buy again. have bought again.
reconstituted the IGF-1 LR3 1 mg and it went clear instantly. no haze. you can tell straight away when it has been done properly. no mannitol surprise, cake intact, not collapsed.
split the order across two lots to compare. came back within 0.1 of each other. gradient and column are both printed so you could reproduce it. boring supplier. highest compliment I have.
the cold element was still solid on arrival, in July. the reorder was identical to the first order in every respect I could check. defaulting to them until something changes.
packing was the desiccant sachet actually inside the secondary container. someone in that warehouse cares. test your own vial regardless. always.
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 KP sells
Zhuhai Kerui Biotechnology 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 KP at keruipeptides.com →
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.