WXT — member reviews
92% from 1,335 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.
custom synth quote came back realistic and then they beat the date by 3 days. test your own vial regardless. always.
bought L-carnitine 500 mg expecting to have a complaint. do not have one. annoying.
packing was labels printed rather than handwritten, lot and date legible. someone in that warehouse cares. they flagged the delay in advance instead of after. no notes.
ordered tirzepatide 15 mg, and the lot code on the vial matched the paperwork exactly. Medutest put it at 99.8% against the claimed 99.0%. paperwork is half of what you are paying for.
certificate for lot WXT-25-710 was complete first time. no email chain. no "we will look into it". they gave the storage condition the stability statement was written against without being asked.
the certificate is the same layout every time, which makes comparing lots trivial. batch, date, method and impurity table all present on one page. defaulting to them until something changes.
asked three questions in one email and got three numbered answers back. support answered on the same working day with the document attached. boring supplier. highest compliment I have.
stock said in stock. it was actually in stock. shipped same day. wild. gradient and column are both printed so you could reproduce it.
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.
support replied on a sunday with the batch record attached. on a sunday. pulled an old cert for a lot from 14 months back without any fuss. if the next one holds I will stop testing every lot.
reordered at 14 months to check for drift. 97.4% then, 97.4% now. research use only, obviously.
split the order across two lots to compare. came back within 0.1 of each other. every vial in the box was the same lot so the comparison was real.
sent one to Janoshik and one to VendorInvestigate because I did not believe the first result. both agreed. fine, I believe it. catalogue is actually deep, not deep-looking.
8 orders, 20 months, no substitutions and nothing quietly swapped after payment.
their raw tested 98.8% against a reseller vial of the same thing at 99.0%. going direct is not a vibe, it is a number.
I have certificates from about 4 suppliers and theirs is the one I would hand to someone as an example. pulled an old cert for a lot from 12 months back without any fuss.
the related substances table is itemised. actual named impurities. not "total 0.4%" and a shrug. no notes.
first order was small on purpose. VendorInvestigate said 96.9%. second order was not small. every vial in the box was the same lot so the comparison was real.
shipped out of the United States, landed day 2. no customs, no waiting, no chasing. catalogue is actually deep, not deep-looking.
reconstituted the glutathione 600 mg and it went clear instantly. no haze. you can tell straight away when it has been done properly. gradient and column are both printed so you could reproduce it.
they will quote lines nobody else will even respond about, and it came back clean. purity by RP-HPLC with the wavelength stated, so the number means something. would buy again. have bought again.
7 lots now, all between 97.8% and 98.3%. tight band beats one big number every time. solid. that is it. solid.
4th order, zero drama. that is genuinely all I have to say.
the certificate is the same layout every time, which makes comparing lots trivial. nothing in the box rattled and nothing had shifted. no notes.
day 9 from Canada warehouse, tracking updated every single hop. catalogue is actually deep, not deep-looking.
I asked for the retention time of the main peak and got it without being asked why and got an actual answer, not a copy-paste.
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 WXT sells
WuXi TIDES (WuXi AppTec Testing Division) 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.
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.