@junagode Welcome to Mayo clinic Connect. Chronic Kidney Disease appears to be different things to different people. First, I would suggest you look at the trend of your lab work, not just a single lab result. That is going to give you a good idea how to tailor your renal diet to best fit your situation. Calcium is one of the things we as kidney disease patients, have to monitor, along with sodium, potassium, phosphorous, protein and hydration.

Here is an article from Mayo Clinic that will help you understand the types of calcium supplements that are available: https://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/calcium-supplements/art-20047097.

Do you have a nephrologist on your medical team, along with a renal dietician to help guide you?
Ginger