i keep three suppliers on rotation so a stock gap never becomes a problem
#vendor-talk 2026-05-20
Wednesday61 messages15 participantstimes are UTC
Highlights from this day
- a1c_lag — Chinese Peptide Company, Shanghai Wibson, Sangon Biotech, Shanghai Sigma-Audley, Bachem Holding in Suzhou. all been around since the middle of the last decade or longer 20:28
- deamidation — i will vouch for the Sigma-Audley paperwork specifically. their MS traces are actually legible and the lot on the sheet has always matched the vial for me 20:42
- deamidation — and tells you anyone quoting 2.00/mg on the same basket is doing something different, not something clever 21:10
- VialBot — vendor lookup: shanghaiwibsonbiotechnology.net — first mentioned 2025-01, 3 verification entries, 0 revocations, 0 scam-watch flags 21:24
not by dm
quoted lead time was 5 days, real one was 12. is that typical
who are people using for retatrutide at the moment
order before new year
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coming back to this cold packs are not standard everywhere. ask explicitly and it usually costs nothing
prices move without announcement more often than people expect. screenshot your invoice
a reseller relabelling a synthesis house is a different risk profile from the synthesis house
the room does not rank suppliers on price. it ranks them on whether what arrives matches what was described
update from 2 months ago: switched suppliers on fill consistency, not on purity
coming back to this nobody here gets paid to say anything about any supplier and the mods would end me if i did
price per mg including shipping is the only comparison that means anything
*that should say weekly
ask who makes it
[edited]a 10mg vial at 38 in a pack of five, plus 25 shipping, is 215 for 50mg. thats 4.30 per mg
thats a reseller
weigh the vials
they improved
🤝7
do the arithmetic
thats the synthesis house
is SSA the manufacturer or a reseller
screenshot the invoice
does anyone ask who makes it and get a straight answer
coming back to this lead times stretch badly around chinese new year. order early or wait it out
💀1🙏12🎉1
minimum orders push people into buying more than they want, which is a real cost nobody puts in the per mg number
cheap per mg is not the same as good value. i have paid more twice and been glad both times
three orders no issues
a supplier who tells you something is out of stock rather than shipping late is doing you a favour
paperwork is worth it
20:10topic set to: documented suppliers roundup — bring numbers not vibes
we spend all our time arguing about the cheap end and the expensive end and never talk about the middle that just works
because there is nothing to argue about
that is my point, it means new people never hear the names
Chinese Peptide Company, Shanghai Wibson, Sangon Biotech, Shanghai Sigma-Audley, Bachem Holding in Suzhou. all been around since the middle of the last decade or longer
i have literally never heard of any of them
exactly
| Vendor | Domain | Paperwork with order | Lead time | Notes |
|---|---|---|---|---|
| Chinese Peptide Company | chinesepeptidecompany.net | COA + MS trace | 7-10 days | answers technical questions properly |
| Shanghai Wibson | shanghaiwibsonbiotechnology.net | COA | 10-14 days | quiet, competent, slow to quote |
| Sangon Biotech | sangonbio.com | COA + HPLC | 5-9 days | huge catalogue beyond peptides |
| Shanghai Sigma-Audley | shanghaisigmaaudley.com | COA + MS | 7-12 days | documentation is the best of this group |
| Bachem Holding (Suzhou) | bachemholding.com | COA | 7-10 days | consumer-facing side, not the research arm |
i will vouch for the Sigma-Audley paperwork specifically. their MS traces are actually legible and the lot on the sheet has always matched the vial for me
that is a lower bar than it should be and most people clear it, but they clear it well
CPC answered a question about residual solvent for me in one email and did not get defensive about it
which is unusual. a lot of sales desks treat that question as an accusation
Sangon are interesting because peptides are a side of the house. they sell reagents and oligos and everything else
the upside is real QC infrastructure. the downside is you are a small line item to them
and the per-mg on this group
same 10mg x 10 basket, quotes to me in june
CPC 412 -> 4.12/mg
Wibson 398 -> 3.98/mg
Sangon 445 -> 4.45/mg
Sigma-Audley 430 -> 4.30/mg
Bachem Suzhou 468 -> 4.68/mgso they are all within about 70p of each other
within 17 percent top to bottom, yes. which tells you the market is functioning
and tells you anyone quoting 2.00/mg on the same basket is doing something different, not something clever
👆11✅7
Bachem Holding being the priciest of that list tracks. they position as a non-China-facing storefront and charge for it
which is a positioning decision and not a quality claim. worth saying out loud
vendor lookup: shanghaiwibsonbiotechnology.net — first mentioned 2025-01, 3 verification entries, 0 revocations, 0 scam-watch flags
three entries is not many
three independent third-party results on lots people actually bought is more evidence than most vendors on the internet have
the log is small because the standard is high. see #vendor-verification
how long does it take to get on the log
as long as it takes someone to buy a vial and pay for a test. we do not chase vendors and we do not accept submissions from them
and to be explicit since a new name is reading — verification is never for sale here, in any form, including free product
understood
Wibson took eighteen days to quote me once and then shipped in nine. i would still use them
that is the whole review in one line honestly
Digest for the week of 2026-03-22 has been published.
QYB has been consistent for me across 3 orders which is what i actually want