I found another article that explains mast cells and histamine intolerance. It seems histamine itself can cause hypercalcemia:
Histamine toxicity - Acidic Body
acidicbody.com
Another piece to add to my puzzle. I need calcium, but can easily get too much of it.
Very informative site. But if Pancreatic insufficiency is the cause of Histamine problems, than there is no cure right? Would Vit K2 help with moving excess calcium deposited around Pancreas and Kidneys?