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.
Too little calcium = osteoporosis?
Not necessarily. One needs to think of the anion. Magnesium citrate (water soluble) plus calcium oxalate (insoluble) = magnesium + oxalate + calcium + citrate (all soluble in layman's language, and excretable)
I form kidney stones - both kinds, evidently according to my doc - so I have been very leery of taking calcium supplements. The only calcium I will take is the Cal-Mag Supreme by Solray which is balanced and has boron and other supporting minerals and herbs.