You are not imagining it and you are not being difficult. Document it and take the document in.

Test one thing at a time. It feels slower and it is the only way to learn anything.

Written confirmation email after every phone call. Cheapest insurance there is.

You are not imagining it and you are not being difficult. Document it and take the document in. How long have you been on a price change?

It gets smaller. Not easy, smaller. That distinction kept me going.

Stupid question: how do you know whether what is in the vial matches the label at all?

An inconclusive account is useful if it stops the next person mistaking a story for a controlled comparison. Same for me with GHK-Cu, unfortunately.

You are not imagining it and you are not being difficult. Document it and take the document in.