Surely we have to acknowledge that there is a risk of Vitamin D toxicity at some level. It is fat soluble, and the fat-soluble vitamins tend to build up when we consume them in excess of need. I realise that just what constitutes “too much Vitamin D” is not clear right now, but I would be willing to wager that we need less on a well-formulated ketogenic or ZC/carnivore diet, just from the very nature of things. So I have no problem with the notion that a woman might have accidentally gotten too much Vitamin D.
There are so many variables in the case that it is impossible to assess what really happened without reading the full text of the case report. We don’t know why she was supplementing, how much she really needed, how much she was actually absorbing of what she ingested, what her sun exposure was . . . need I go on?
It seens to me that the two conclusions we must not draw from this case report are: (a) that supplementing is always bad, and (b) that adivsing the patient to stop supplementing with Vitamin D and calcium shows that the doctors on the case were idiots.
Did they reach the right conclusions from that lady’s experience? That is a whole different question, and I don’t know the answer to that, without more information.