Magnesium citrate. What would be a good dosage? Too much would disturb your bowels. But some regularly will kepp from forming calcium oxalate kidney stones, I think.
Like mentioned in the post above, about 800 mg/day. Citrate is good and don’t waste it, but ultimately switch to one of the other forms I mentioned.
You are exactly right on the issues with calcium. What Drs won’t tell you (because they really don’t know) is that calcium cannot dissolve/absorb without sufficient amounts of mag. So, what happens is calcium forms crystals in the lungs, kidneys, gallbladder, JOINTS (read arthritis), etc. Even breasts. You’ll hear of women getting a mammography and it shows a “calcification”; that is the result of being mag deficient.