Parathyroid disease causes high or low calcium levels and is associated with cramping, as is thyroid dysfunction.

CNN: What causes leg cramps?

Getting a low score on the calcium test is good, but it does not entirely rule out future heart disease.

FORBES: My Visit with a Cardiologist, and What You Should Know About Your Heart

Half made no change in their diets, while the other half increased calcium from low-fat dairy foods to about 1500 milligrams a day.

CNN: Study says calcium may cut colon cancer risk

That's where they hit you with things like "low fat" and "low sugar" and "added calcium" and vitamin this and vitamin that.

CNN: Our obsession with sugar, salt and fat

Proponents also point to a recent study published in JAMA, which found that high-energy shock waves were better than low-energy waves in treating patients with shoulder tendinitis resulting from calcium deposits.

FORBES: The Big Hurt

Like calcium, most physicians check it routinely and will obtain dietary counseling for moderately low levels or prescribe replacement if the level is very low.

CNN: Do vitamins help against type 2 diabetes?