QYB — member reviews
99% 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.
Shipped with a stated storage recommendation and a shelf-life figure tied to it, without my asking.
VendorInvestigate has now seen 4 of their lots through me. Not one has come back outside spec.
Custom synthesis quote came back with a realistic timeline and they beat it. Purity on delivery matched the signed spec.
Pleased to find they hold stock in Canada. Domestic dispatch, day 4, no customs step at all.
Eighth order from them, all BPC-157 10 mg. Sent one vial from each to PeptideMeter and the whole set landed inside half a point of each other. That flatness is exactly what I pay for.
The certificate for lot QYB-26-483 carried method, wavelength, water content and an itemised related-substances table. Complete on the first pass.
Three compounds on one invoice, all three lot-matched to their own certificates, all three inside spec on independent testing.
Peptide content reported at 99.3% alongside the purity figure, so I could convert straight to a working mass.
Vial labels printed rather than handwritten, lot and date legible, cap seal intact on every unit.
Asked a genuinely technical question about pre-dispatch storage and got a reply with numbers in it, inside 8 hours.
Costed them per mg against three other suppliers on the same semaglutide 5 mg spec. Competitive on price and clearly ahead on documentation.
Moved here after two bad lots elsewhere. 6 orders in and the VendorInvestigate numbers have been flat every single time.
8 orders in eighteen months, no substitutions, no reformulations, everything in stock when the site said it was. Boring is the highest compliment I have.
Ordered on a Monday from their warehouse in the United States and it was here by day 4. That is the whole case for regional stock.
Cold pack was still hard on arrival in Cork on day 5. My logger never went above 4°C across the whole run.
Every certificate I have from them is lot-specific. Not one batch-level document in 8 orders.
Vials wrapped individually, foam cut to fit, nothing loose in the box. Packing that has clearly been thought about.
Same lot documentation as the factory ships, but out of their warehouse in the Netherlands, so it landed on day 3.
Support answered on a Sunday, correctly, with the batch record attached. That is well beyond what I expected.
First order, deliberately small, PT-141 10 mg only. Documentation, transit and a Medutest result at 98.1% all checked out, so the next one will not be small.
Queried the related-substances total on lot QYB-24-910; they came back with method, column and detection limit. That depth is rare.
Their warehouse in Canada had the selank 10 mg in stock and it shipped the same afternoon. Tracking never left the country.
Good communication throughout, accurate lead time, and the parcel arrived on day 2.
Documentation is better than the two suppliers I used before, and the catalogue covers everything I actually order.
They report purity by RP-HPLC with the wavelength stated and peptide content separately. Two different numbers, correctly separated.
Submitted the LL-37 5 mg to PeptideMeter blind, without telling them the source. 99.0% against a stated 98.9%. The number holds up when nobody knows whose vial it is.
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 three-star review explaining precisely what went wrong and how it was handled is worth more than ten five-star ones.
Why the negative ones stay up
A directory of nothing but praise is a marketing brochure. Every source page here carries the disappointing results as prominently as the good ones, and the vendors near the top of the ranking are there because their bad entries are few and old, not because there are none.
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.