QYB
ChinaPeptides Co., Ltd. (QYAOBIO)
Shanghai · China · est. 2008 · source page added 8 Dec 2023
Buy direct from QYB at qyaobiopeptides.com →
Their storefront, not ours. Marked nofollow and sponsored, and nobody here is paid for it.
A custom-synthesis house first and a catalogue vendor second. Established 2008, Shanghai. If you want something unusual made, the quote is honest and so is the timeline — six weeks quoted, five delivered, on the one custom job members have documented end to end. Technical questions get technical answers, which is the tell for where the expertise actually sits.
- Legal name
- ChinaPeptides Co., Ltd. (QYAOBIO)
- Short code
- QYB
- Also known as
- QYB, QYB Biotech, ChinaPeptides Co., Ltd. (QYAOBIO)
- Shop domain
- qyaobiopeptides.com →
- City
- Shanghai
- Established
- 2008
- Community rating
- 93%
- Independent tests logged
- 4
Regional stock, so orders ship inside the buyer’s own country.
- 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
- Genuine custom synthesis capability with realistic timelines and written quotes
- Established 2008 with a verifiable entity behind it
- Technical questions get technical answers rather than sales copy
- Custom work has custom pricing — get the quote and the specification in writing, which they provide as a matter of course
- For custom synthesis, agree the minimum purity specification up front; the documented job was quoted at 95% and delivered at 96.4%
- For stock lines, ask for the batch-specific certificate and the analysis date rather than the catalogue document
| Date | Service | Compound | Batch | Claimed | Result |
|---|---|---|---|---|---|
| 2026-03-27 | Janoshik | Semaglutide 10mg | QYB-2603 | 98.5% | 98.6% |
| 2025-10-14 | PeptideMeter | Tirzepatide 10mg | QYB-2510 | 98.0% | 98.3% |
| 2025-03-18 | Medutest | Custom 21-mer | QYB-2503C | 95.0% min | 96.4% |
| 2024-08-06 | Janoshik | BPC-157 10mg | QYB-2408 | 98.0% | 98.1% |
| From | To | Carrier | Days |
|---|---|---|---|
| Shanghai | UK | DHL | 7–10 |
| Shanghai | US West | DHL | 8–11 |
- 1[Vendor] QST vs QYB on the same compound, same month — both cleared 99.0%c/tirzepatide · 7.4k points · 62 comments
- 2[Lab] 9th independent test on QYB — 97.7% on a claimed 97.0%, and the trend is the interesting partc/retatrutide · 7.2k points · 42 comments
- 3[Vendor] HJ vs QYB on the same compound, same month — both cleared 97.0%c/coa · 6k points · 29 comments
- 4[Lab] 20th independent test on QYB — 97.9% on a claimed 97.0%, and the trend is the interesting partc/vendorvetting · 5.8k points · 61 comments
- 5[Meta] proposal — a flair for LC-MS postsc/hplc · 4.2k points · 60 comments
- 6how much of what we believe about HPLC actually comes from integration threadsc/hplc · 3.2k points · 68 comments
- 7[PSA] testing is not what most of this community thinks it isc/vendorvetting · 3.2k points · 62 comments
- 8three years of method development threads, summarised so you do not have to read themc/hplc · 2.8k points · 36 comments
- 9[Lab] QYB BPC — Medutest came back 99.2% against a claimed 99.0%c/labresults · 2.6k points · 55 comments
- 10[PSA] Janoshik results are area% by default and people keep forgettingc/vendorvetting · 2.1k points · 64 comments
- 11[Vendor] QYB vs HJ on the same compound, same month — both cleared 99.0%c/semaglutide · 2k points · 35 comments
- 12the excursion thing finally clicked for me and I want to write it downc/coldchain · 1.6k points · 61 comments
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.
ChinaPeptides Co., Ltd. (QYAOBIO) sells from its own storefront. Read what they say about themselves against the log above, then decide.
Go to the QYB store — qyaobiopeptides.com →
Check the lot on the vial against the lot on the certificate when it arrives. A good record predicts your batch; it cannot guarantee it, and no storefront can.