Tove★★★★★
I was nervous about ordering at all, so I am writing this for whoever is where I was. I sent the tirzepatide 15 mg to PeptideMeter and it came back 97.8% against a stated 97.6%, and I felt a lot calmer afterwards.
Sourcing reference
WuXi TIDES (WuXi AppTec Testing Division)
- Base
- Wuxi
- Established
- 2002
- Shop
- wuxitides.net →
4.5
★★★★⯨A rating here summarises what members have said about ordering. It is not a safety rating and it cannot be one.
WuXi TIDES (WuXi AppTec Testing Division), trading as WXT, based in Wuxi and giving 2002 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.
WXT is the entry in this set that reads most like an institution. Members describe documentation in the format a laboratory would expect, and correspondence that assumes the reader knows what they are asking for.
Practically: quotes returned within a working day, dispatch quoted at three to five working days, no minimum order that members here have encountered, and regional stock in Europe, the United Kingdom and the United States for the frequently ordered lines. Customs documentation has been described as correct first time across repeated orders.
The certificate carries the lot code, the method, the gradient, the column and the wavelength. The batch record is obtainable by quoting the lot code, and members have described it arriving without a follow-up.
The testing record, and its limits
The published analytical record for this catalogue is long and members here have commissioned their own analysis on top of it. The comparisons posted here have agreed to within the sort of margin that two competent laboratories differ by anyway.
That last point is worth spelling out, because it comes up in this community regularly: two labs with different gradients can resolve a close-eluting impurity differently and return two honest, different answers. A disagreement of a few tenths is a methods fact, not a finding about a supplier.
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 wuxitides.net, gives Wuxi as its base and 2002 as its founding year
- That certificates carry the gradient and column chemistry, because members have posted them
- That independent analysis for this catalogue exists in quantity across several years
- That customs documentation has been correct first time in the reports we hold
Cannot be checked
- How a large organisation's internal divisions map onto a given catalogue line, which is not published by anybody
- What your specific parcel experienced between dispatch and delivery
- Sterility, endotoxin and residual solvents, none of which a purity certificate addresses
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 peptide content by weight reported for this lot?
- Which stock will this dispatch from and what is the window?
- Can I have the manufacturing record for this lot code?
Member reports
Published in full, in the words they were written in.
Paloma K.★★★★★
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. Sending this with love to whoever is reading it at 2am.
Nabila A.★★★★★
I reordered at 24 months to check nothing had drifted, and it had not — 96.8% then and 96.8% now. I am glad I asked before I ordered, and I would say ask.
Nadia R.★★★★★
I asked for an old certificate from 15 months ago, half expecting to be ignored, and they found it and sent it over without any fuss. They told me the storage conditions without my having to ask. I hope that helps somebody who is where I was six months ago.
Hedda S.★★★★★
The sermorelin 5 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. It is not the cheapest and I have made peace with why. I will keep ordering here, and I will say so if that ever changes.
Jonas N.★★★★★
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.
Lucia★★★★★
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. Every vial in the box was from the same lot. Sending this with love to whoever is reading it at 2am.
Janek S.★★★★★
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.
Ayesha K.★★★★★
The documentation is in the format a laboratory would expect, which took me a while to appreciate and is now the reason I order here.
Dilara★★★★★
I placed 6 orders over 9 months and nothing was ever substituted or quietly swapped after I had paid. They told me the storage conditions without my having to ask.
Camila★★★★★
If you are trying to work out whether a certificate is a real one, theirs carries the gradient and the column chemistry. That was the thing that finally let me stop second-guessing. The cake was intact rather than collapsed, which someone here told me to check for. No complaints, and I would have said if there were any.
Rohan S.★★★★★
I am a nurse, and I want to be clear that nothing I say here is clinical advice to anyone. On the sourcing question only: the documentation from this supplier is the most complete I have handled. Peptide content was 98.8%, so converting to a working solution was straightforward. Take what is useful from this and leave the rest.
Cato★★★★★
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 paperwork is genuinely half of what you are paying for.
Niels M.★★★★★
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. The purity is measured by RP-HPLC and the wavelength is written on the certificate. These are research compounds and they are not approved for people to take. I want to be honest about that.
Anya★★★★★
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 Canada, so there is no long wait.
Mateusz I.★★★★★
The cold pack was still solid when I opened it on day 4. I had been worrying about that all week for nothing. They told me the storage conditions without my having to ask.
Nils★★★★★
Packing was thoughtful — a tamper strip that had to be cut rather than peeled. It sounds small. When you are anxious about a parcel it is not small. I am glad I asked before I ordered, and I would say ask.
Clara I.★★★★★
Shipped from Poland, arrived on day 6. I mention it because waiting and not knowing was the hardest part for me, and there was none of that here. Peptide content was 98.6%, so converting to a working solution was straightforward.
Gustav★★★★★
Certificate carried the gradient, the column and the wavelength. I could reconstruct what had been done, which is not something I can say about most of the paperwork I have handled.
Chiara★★★★★
I asked a question I was embarrassed about and got a patient, specific answer back with no sales pitch attached.
Hedda G.★★★★★
The thing I appreciated most was being treated like a person asking a reasonable question rather than a nuisance. They keep the lines I reorder in Poland, so there is no long wait.
Bilal W.★★★★★
Tracking updated at every stage, which sounds trivial and was the difference between a calm week and an anxious one. They told me the storage conditions without my having to ask. Nothing here is a promise about your parcel. It is a record of mine.
Oskar B.★★★★★
My independent result came back three tenths below the published one and somebody in the circle explained that two labs with different gradients can honestly differ by that much. Worth knowing before you panic, as I nearly did.
Lukas M.★★★★★
Customs documentation right first time across four orders. For anybody outside Europe, that is worth more than a day of transit either way.
Aksel S.★★★★★
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. The certificate is signed and dated by a named person.
Valeria★★★★★
My first order was deliberately tiny because I was frightened of getting it wrong. The documentation was complete, the VendorInvestigate result was 97.3%, and the next order was not tiny. The purity is measured by RP-HPLC and the wavelength is written on the certificate.
Talking about WXT in the circles
This page is the reference. The thread is the conversation, and it links back here.
WXT documentation in laboratory format, read line by line
A WXT certificate is laid out the way a laboratory would expect, and I want to read one line by line here because the format is unfamiliar if you have only seen consumer-facing documents. Lot code,…
Where WXT sells
So you can read their account against this one.
WuXi TIDES (WuXi AppTec Testing Division) 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.