Hi! I had my first kidney stone about 20 years ago. Two years later I had 8 in my kidney. I had them smashed using shockwave lithotripsy. I then gave a lot of thought as to why I was getting them. I was drinking plenty. My opinion (just mine, not from any doctor) was this. I was drinking Evian water as I didn’t like the taste of out local tap water. If you look at the labels on bottled water, a lot of them are high in minerals and vitamins (added in on purpose). I found the calcium level in Evian was high. I stopped drinking bottled water….had a Culligan water, reverse osmosis system installed….and BA’H have not had a single stone in 18 years. I do not have any medical proof on this, but it worked for me. As far as I know there are not any guidelines for prevention. My own urologist did not believe in cutting calcium out of my diet (dairy foods etc), so I still eat whatever I want.
Hope this helps and good luck – kidney stones are NOT FUN!