Calcium Carbonate is a Phosphate binder, if my phosphorus levels gets high, it will exacerbate my hyperparathyroidism and it will weaken my already weak bones.

Yes I needed calories and protein but I cannot do exercises because it will only strain my weak joints and I am much susceptible to injury rather than getting benefits from exercises. However I am getting improvements with my bones because of what I do with my daily diet and eating habits but gaining weight is still a problem that I cannot do anything about.