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Diet - calcium
The preferred source of calcium is calcium-rich foods such as dairy products. Some people will need to take calcium supplements.
The Recommended Dietary Allowance (RDA) for vitamins reflects how much of each vitamin most people should get each day. The RDA for vitamins may be used to help create the goal for each person.
How much of each vitamin you need depends on your age and gender. Other factors, such as pregnancy and illnesses, are also important.
Infants (Adequate Intake)
Children and Adolescents
Pregnancy and Breast-feeding
Up to 2,500 - 3,000 mg a day of calcium from dietary sources and supplements appears to be safe for children and adolescents, and 2,000 - 2,500 mg a day appears to be safe for adults.
The following list can help you determine how much calcium you are getting from food:
Vitamin D is needed to help the body absorb calcium. When choosing calcium supplements, look for ones that also contain vitamin D.
Escott-Stump S, ed. Nutrition and Diagnosis-Related Care. 6th ed. Philadelphia, Pa: Lippincott Williams & Wilkins; 2008.
Sarubin Fragaakis A, Thomson C. The Health Professional's Guide to Popular Dietary Supplements. 3rd ed. Chicago, Il: American Dietetic Association;2007.
Institute of Medicine. Food and Nutrition Board. Dietary Reference Intakes for Calcium, Phosphorous, Magnesium, Vitamin D, and Fluoride. National Academy Press, Washington, DC, 2010.
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