Why do they enunciate calcium is virtuous for you but its unpromising for your heart?

Why do they enunciate calcium is virtuous for you but its unpromising for your heart?
No that is not correct, because:
1. calcium is have need of as the main component for the nouns and the hardening of the bones contained by the body.
2. Also calcium is iportant in allowing the exocytosis processes of the cell (to export out materials). As this process is very essential contained by the release of neurotransmitters from the presynaptic to the postsynaptic cells.
3. About the heart. Calcium is greatly important within initiating the normal processes of the heart and that by allowing the threshold hilltop to be achieved and tha will also allow the redepolarisation process to be occured (membrane potential pocesses specifically carried out by the cells after the depolarisation phase, here in attendance are other ions will be used such as K+ and Na+). All that will cause the heart to coneract and function properly...
I don't reflect it is bad for your heart...i expect what they were referring to is the calcification of blood vessel which can lead to heart devastate and even death.don't i could be wrong.
Ca 2+ not desperate for heart in its middle-of-the-road level, but if hypercalcemia materialize the heart may stop in systole (mean the heart 'll stop hammering & kept contracted).