“Registered with” is doing an enormous amount of work in that sentence.

Narrow conclusion, briefly right. Broad conclusion, interestingly wrong. I know which I keep choosing. A fortnight in on folate and it lines up.

Reference ranges differ between labs, so comparing two reports is close to meaningless.

Where does the human data stop and the extrapolation begin? That is the whole thread.

Half of what people describe as tolerance is a change in the underlying condition, and the two need different answers.