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Calcium-Fortified Foods & Supplements -- bottle of calcium-fortified orange juice

Answer:

In general, it appears to be preferable to get most of your calcium from foods which contain it naturally, and to restrict the amount you get from supplements (including calcium-fortified drinks and foods like orange juice, soy milk, almond milk, and even calcium-fortified milks like certain lactose-free milks — which are like taking a supplement with food). (A common form of calcium added to these beverages, as well as to gummy and liquid supplements, is calcium phosphate or tricalcium phosphate.) For example, getting too much calcium from supplements has been associated with an increased risk of kidney stones, heart attack and death in women, and an increase in the risk of heart attack in men. Taking calcium supplements has also been associated with an increased risk of dementia in elderly women who have evidence of cerebrovascular disease or who have a history of stroke. Nevertheless, calcium from all sources counts toward the Tolerable Upper Intake Level (UL) above which the risk of adverse effects increase — although it is rare to exceed this limit from food alone. 

If you are considering taking a calcium supplement, be sure to calculate how much calcium you are already getting from food, and from other sources, such as over-the-counter antacids, and then only supplement with the amount you need to meet the recommended daily intake. For more about getting the right amount of calcium, sources and different forms, and our tests of popular products, see the Calcium Supplements Review >>

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