how many independent tests before you trust a vendor. my number is three
Trying to get a straight answer on this: how many independent tests before you trust a vendor. my number is three.
Inter-lab variance on this assay runs a point or two either way. Two services disagreeing by that much is agreement, not a discrepancy, and treating it otherwise starts pointless arguments.
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.
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.
Not medical advice, obviously, and nothing here is approved for human use. One person with a spreadsheet.
best — the order this archive was captured in
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.
I would separate documentation from logistics. A supplier can be excellent at one and ordinary at the other, and averaging them hides it.
Did you ask for the batch-specific certificate, or the generic one?
Started buying small deliberately, tested every lot for the first four, then stopped testing every lot because there was nothing to find.
This. Ask for the batch record. The ones who send it inside a day have told you more than any review could.
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.
Yes. Spread across lots is the number that tells you about the process. A single high result tells you about a vial.
the source page log is more useful than the score above it
Six orders across two years from KP. Same packaging, same paperwork, same lead time. The most boring supplier relationship I have and I mean that as praise.
Where a supplier holds regional stock, ask which lines are actually held there rather than drop-shipped. It changes the lead time and it changes the customs question.
The thing that decided it for me was that SWB answered a column-and-gradient question in writing without asking why I wanted to know.
The wider-market rows in the directory carry a band and a report count and nothing else, deliberately. Anything more would be manufacturing precision that the evidence does not support.
The wider-market rows in the directory carry a band and a report count and nothing else, deliberately.
Would qualify this slightly. Fewer entries means less sampling, and less sampling is not the same as a worse process.
what does the certificate actually carry — that is the whole question
a claim with no batch number is a marketing document
a supplier that answers method questions in writing has already told you a lot
Tracking number redacted from the post above. It identifies both ends of a shipment.
the wider-market names in the table are there because nobody has enough data on them
- 1This. Ask for the batch record. The ones who send it inside a day have told…7 comments in this branch · started by u/bence_zielinski