Who should take calcium supplements?
Calcium is an important mineral for the human body. It helps build and protect your teeth and bones.Getting enough calcium over your lifetime can help prevent osteoporosis.
Most people get enough calcium in their normal diet. Calcium is found in dairy foods and leafy green vegetables. Older women and men may need extra calcium to prevent their bones from getting thin (osteoporosis).
Your health care provider will tell you if you need to take extra calcium.
Types of calcium supplements
The two main forms of calcium pills are:
When choosing a calcium supplement:
How to take extra calcium
Increase the dose of your calcium supplement slowly. Start with 500 mg a day for a week, and then add more over time.
Try to spread the extra calcium you take over the day. Do not take more than 500 mg at a time. Taking calcium throughout the day will:
The total amount of calcium adults need every day from food or calcium supplements:
The body needs vitamin D is needed to help absorb calcium. Try to choose calcium supplements that also contain vitamin D.
Side effects and safety
Do not take more than the recommended amount of calcium without your doctor's OK.
Try the following steps if you have side effects from taking extra calcium:
Always tell your health care provider and pharmacist if you are taking extra calcium. Calcium supplements may change the way your body absorbs some medicines. These include certain types of antibiotics and iron pills. Taking extra calcium over a long period of time raises the risk of kidney stones in some people.
Institute of Medicine. Food and Nutrition Board. Dietary Reference Intakes for Calcium, Phosphorous, Magnesium, Vitamin D, and Fluoride. National Academy Press, Washington, DC, 2010.
NIH Osteoporosis and Related Bone Diseases National Resource Center. Calcium and vitamin D: Important at every age. Reviewed January 2012 http://www.niams.nih.gov/Health_Info/Bone/Bone_Health/Nutrition/ (accessed February 3, 2013).
Rosen C. Osteoporosis. In: Goldman L, Schafer AI, eds. Cecil Medicine. 24th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 251.
Updated by: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, Bethanne Black, Stephanie Slon, and Nissi Wang.
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