The last time I saw my doctor she mentioned Calcium supplements can cause kidney stones(1). They can also be bad for your heart(2). Also, it often is not clear how pure supplements are. She advised me to get as many nutrients as I could from my regular food.

1 - https://www.webmd.com/kidney-stones/news/20151013/calcium-su... 2 - https://www.mayoclinic.org/diseases-conditions/heart-attack/...