Several possibilitie. While it can be intake of calcium milk vitamins minerals I really excessive amounts that is not likely. The body regulates calcium so...if dietary is hi, it just doesn't get in. Mainly it is elevated when a regulatory system is messed up. Too much parathyroid hormone elevates calcium Having bones breaking down can also do that.
Dairy is best source. Dairy is the best source. Some non-dairy sources include calcium fortified soy milk, calcium fortified rice milk, tofu, sardines, beans, almonds, calcium fortified orange juice, bok choy, mustard greens, turnip greens, enriched breakfast cereals, etc... A shopper should always check the food labels to see how much calcium is in a serving. Also, tum's smoothies is often used as a calcium source.