unpopular opinion: most of what gets said here about VendorInvestigate is guesswork
unpopular opinion: most of what gets said here about VendorInvestigate is guesswork — a position I have arrived at slowly and would like tested.
Why the directory has two tiers, since the question comes up whenever somebody new finds it.
Twenty suppliers have enough independent results, over enough separate lots, over enough time, that the log says something. Those get a page, a test table and a link to their own storefront so you can compare their claims with the record.
The rest — nearly two hundred names — get a row, a band and a report count. Not because they are bad, but because two results is an anecdote about a vial. Manufacturing a score out of that would make the whole directory worthless, and the contrast is the point.
A certificate with a purity figure and no method line is not falsifiable. You cannot reproduce it, you cannot check it, and it tells you nothing about how the number was produced.
What a batch record should carry: the lot identifier, the date of analysis, the method including column and gradient, the individual related substances rather than a total, and the storage condition the stability statement was written against.
Ask me anything specific. Anything general I will probably get wrong.
best — the order this archive was captured in
Lead time and minimum quantity are the two facts people forget to ask for and then argue about later. Both are answerable in one email before you commit.
Tracking number redacted from the post above. It identifies both ends of a shipment.
Asked WXT for the batch record on a Tuesday and had the full document, batch and method line, before the end of the day. That is the bar now.
Tracking number redacted from the post above.
Adding the practical version: ask for lead time, minimum quantity and the batch record in the same message. Three answers, one email.
Agreed on buying small first. The cost of a test is small next to the cost of committing to a supplier you have not checked.
Independent testing is worth more than a supplied certificate for one structural reason: the chain of custody. A member who buys, ships and pays is testing the same thing you would receive.
I would separate documentation from logistics. A supplier can be excellent at one and ordinary at the other, and averaging them hides it.
Disagree that reviews are worthless. They are worthless when they say "fast shipping A+++". A dated one naming a compound and a document is evidence.
Careful. "Nobody has tested Paradigm Peptide" is a statement about this board, not about the supplier. Say the first thing, not the second.
Xi'an Health Biochem shows up in threads constantly and has almost nothing on file