I can tell you that I was diagnosed with low vitamin D, and was prescribed high doses to bring up my levels.
This resulted in multiple bouts of kidney stones, which I can wholeheartedly not recommend.
I don't take vitamin D supplements anymore.
This resulted in multiple bouts of kidney stones, which I can wholeheartedly not recommend.
I don't take vitamin D supplements anymore.
Basically all vitamins and minerals have very complex interactions, and if you start taking megadoses of one, then it can surprising effects like:
* Cause accelerated utilization of a co-vitamin, causing low levels in these, and rendering the megadoses vitamin ineffective.
* Block or bypass the pathways that utilize a vitamin, causing to high a levels of another vitamin.
* Rendering measurably normal levels of a vitamin ineffective, through competition or exhaustion of the resources the secondary vitamin relies on.
B vitamins for example have complex interactions with each other. I cannot offhand remember the specifics, but if I recall correctly things like “energy” drinks stuffed with megadoses of a vitamin can result in the symptoms of deficiency of another B vitamin despite having normal levels.