PharmD_Rodriguez said:

Vendor reputation tracking for vendor vetting: I maintain a personal spreadsheet with every order I've placed — date, vendor, batch number, Janoshik…

This is my experience too, for whatever a second data point is worth. The detail I would add is minor and it is already implied above.

lucas_SP_BR said:

One habit that pays for itself: post the method alongside the number.

Mine went the same way, slower.

lucas_SP_BR said:

One habit that pays for itself: post the method alongside the number.

Coming at lucas_SP_BR’s question from a different direction. It is worth asking what the claim would look like if it were false. If nothing would look different, it is not a claim about the world and no amount of discussion will settle it.

I would rather be corrected than agreed with, if it comes to it.

The figures, for anyone assembling their own picture. If you are comparing against somebody else’s result, check that you are comparing the same measurement taken the same way. Most of the apparent contradictions in these threads dissolve at that step.

Moderator note: a post naming a supplier has been edited. Discuss suppliers in the review sections, not here. Tagging this one for the weekly digest.