Side Effects:

Increased calcium for a limited periods does not normally cause side effects. However, receiving a large amount of calcium over a long period of time raises the risk of kidney stones in some people.

Those who do not receive enough calcium over a long period of time can develop calcium deficiency. This condition leads to osteoporosis, loss of the jaw bone (osteonecrosis), hypertension, and other disorders.

Persons with lactose intolerance have trouble digesting lactose, the sugar in milk. There are over-the-counter products available that make it easier to digest lactose. You can also buy lactose-free milk at most grocery stores.

In rare instances, some people have a true allergy to the protein in milk. Such persons must avoid all dairy products and may need to take calcium supplements.