PB
>…you can't just start dumping Vitamin D in your system….
Never said you could, yes, research, learn the co-factors. Change your lifestyle, even.
>…too much D can destroy kidneys….
At minimum, mostly not so. Dig very deep into this website and rejoice. Also, check baking soda, and, actually, there are many alternative restorative methods for kidneys out there:
VitaminDWiki
https://vitamindwiki.com/