QYB — member reviews
93% from 1,142 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.
stock said in stock. it was actually in stock. shipped same day. wild. pulled an old cert for a lot from 14 months back without any fuss. happy. moving on.
the thing that sold me is peptide content being listed separately from purity. nobody does that and everybody should. boring supplier. highest compliment I have.
6 lots now, all between 97.3% and 97.8%. tight band beats one big number every time.
ordered thymosin beta-4 5 mg, and the lot code on the vial matched the paperwork exactly. the purity figure is stated by RP-HPLC with the wavelength named. this is one order, not a dataset.
quoted 9 days. arrived 9 days. this is the whole review. every vial in the box was the same lot so the comparison was real.
weighed 9 vials against label out of curiosity. all within 2%. fill consistency is underrated.
shipped from the regional warehouse and arrived in 11 days, domestic the whole way. the purity figure is stated by RP-HPLC with the wavelength named. paperwork is half of what you are paying for.
bought GHK-Cu 50 mg expecting to have a complaint. do not have one. annoying. if the next one holds I will stop testing every lot.
ordered glutathione 600 mg, sent it to Medutest, came back 99.2% on a stated 98.9%. good enough for me. no notes.
split the order across two lots to compare. came back within 0.1 of each other. no mannitol surprise, cake intact, not collapsed. happy. moving on.
the related substances table is itemised. actual named impurities. not "total 0.4%" and a shrug. solid. that is it. solid.
asked about counter-ion and got acetate vs TFA answered properly instead of being ignored. purity by RP-HPLC with the wavelength stated, so the number means something.
I raised a question about net peptide content on a Friday evening and had an answer by Monday and got an actual answer, not a copy-paste. lines I actually reorder are the ones they keep in Poland.
packed in a rigid outer with no movement anywhere in it. the reorder was identical to the first order in every respect I could check. happy. moving on.
sent one to PeptideMeter and one to Medutest 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. test your own vial regardless. always.
6th order, zero drama. that is genuinely all I have to say. no mannitol surprise, cake intact, not collapsed.
packing was the invoice sealed in its own sleeve rather than loose against the vials. someone in that warehouse cares. every vial in the box was the same lot so the comparison was real.
support replied on a sunday with the batch record attached. on a sunday. purity by RP-HPLC with the wavelength stated, so the number means something.
they told me about a 3 day delay before it happened. before. that is the bar and almost nobody clears it. lines I actually reorder are the ones they keep in France.
12 orders, 20 months, no substitutions and nothing quietly swapped after payment. n=1 and I am saying so.
first order was small on purpose. Medutest said 97.1%. second order was not small. the difference between their number and the lab number is smaller than method noise.
their certificate has mass-spectrometric identity alongside the chromatographic purity. I did not expect that and I am not over it.
reordered ipamorelin 5 mg and the second lot tested within 0.2 of the first. nothing in the box rattled and nothing had shifted. research use only, obviously.
blind submitted the tirzepatide 15 mg to Janoshik, did not say whose it was. 99.3% vs 98.9% claimed. purity by RP-HPLC with the wavelength stated, so the number means something. happy. moving on.
reconstituted the TB-500 5 mg and it went clear instantly. no haze. you can tell straight away when it has been done properly. solid. that is it. solid.
their raw tested 98.6% against a reseller vial of the same thing at 98.4%. going direct is not a vibe, it is a number. stated purity and independent purity landed a tenth apart.
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 QYB sells
ChinaPeptides Co., Ltd. (QYAOBIO) 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 QYB at qyaobiopeptides.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.