sarah_TO said:

Closing this out: the trough rather than the peak explains the pattern I was seeing on day six, which I had been blaming on the vial.

I do not accept the framing. The question has been narrowed to the version that has a tidy answer, and the part that was dropped is the part the OP actually asked about.

Ask again with the specifics and you will get a better answer than this one.

sarah_TO said:

Closing this out: the trough rather than the peak explains the pattern I was seeing on day six, which I had been blaming on the vial.

No disagreement, though the timescale matters more than the mechanism here. Most of what looks like a difference in kind turns out to be a difference in how long somebody waited.

sarah_TO said:

Closing this out: the trough rather than the peak explains the pattern I was seeing on day six, which I had been blaming on the vial.

This answered a question I did not know how to ask. Sending this to two other people who asked me the same thing last week.

From the other side of the consultation, briefly. There is a difference between no evidence and evidence of no effect, and this subject is one where the two get swapped freely in both directions.

Dr.DermMIA said:

There is a difference between no evidence and evidence of no effect, and this subject is one where the two get swapped freely in both directions.

Adding a me-too, because a thread of one person's experience is not much use.