FWIW, I take 10,000 iu of Vit D3 and 1000 mg of Vit C per day. Knock on wood, have not been sick in years and don’t, as far as I know, have kidney stones.
I thought calcium was a culprit for kidney stones. I have a calcium deposit in my brain that caused me to pass out. I didn’t know one could get calcium deposits anywhere in the body. I do now!