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On Tuesday, 21 July 2020 20:03:53 UTC+1, alan_m wrote:
On 21/07/2020 19:16, tabbypurr wrote:

As one example, there is evidence that vitamin D deficiency

. Vitamin D is cheap & safe in the extreme,

But what if you haven't got a vitamin D deficiency - is it still safe?

yes, hence I said safe in the extreme

Isn't too much vitamin D toxic and can do damage to the kidneys?

Is it advisable to take if on common prescription drugs for conditions
that rely on the the kidneys to be in good working order and for which
regular test for kidney function are performed?

D doesn't shut down kidneys.

Wrong with the calcification of the kidneys.
https://en.wikipedia.org/wiki/Vitamin_D_toxicity