Dr.Martinez said:

Order of operations matters more than any single choice here: establish a baseline, change one thing, wait long enough for it to express itself, then…

Adding the part of the answer the thread has not reached. Most of what circulates confidently in this community traces back to one summary of one study, and the qualifier was dropped somewhere in the third retelling.

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

One concrete data point for the thread. Worth stating the units and the reference range whenever you post a number here. A large fraction of the apparent disagreement in these threads is two people using different units and both being right.

A narrower follow-up, since the general answer is now clear:

Why a shortage listing created a legal pathway at all, since a shortage is a supply fact rather than a permission?

labquiet_amy said:

Worth stating the units and the reference range whenever you post a number here.

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.

If somebody has the primary source to hand I would rather cite it than paraphrase it.

labquiet_amy said:

Worth stating the units and the reference range whenever you post a number here.

No disagreement with labquiet_amy. One condition attached. Yes, and the corollary is less popular: if the reasoning holds, it also holds where it produces an answer we do not like.

Worth separating that from compounded supply, which this thread keeps folding into the same question. They behave differently and the advice does not transfer.