Let's give them a big welcome. Dr. D - werll, the answer is patients with renal disease are uniformly put on calcium supplement. This helps keep their phosphorus from getting too high, but it also helps protect their bones. What Hony needs to know is the best way to get them is from foods. That's true of calcium also.
Some people though have to take supplements.
Calcium supplements like Tums are very reliable. It's because they still have their bones. The fish bones. An easy way is from Tums. But to prevent them, is to actually increase calcium intake.