Calcium citrate is effective for some uses. However, many uses have only a little scientific evidence in their favor, and some have almost none at all (see Does Calcium Work? for more information).
Because it has been studied quite a bit, good information about calcium citrate dosing is available. For some of the less studied uses, the most effective (and safe) doses have not yet been established. Adequate Intakes (AIs) and Tolerable Upper Intake Levels (ULs) have been established for the mineral.
When determining an appropriate dose for calcium citrate, be sure to remember that every 1000 mg of calcium citrate contains only 211 mg of elemental calcium.
It is possible to take too much calcium citrate. Overdose symptoms may vary, depending on factors such as the dosage and whether it was taken all at once (a single massive overdose) or over a long period of time (a chronic overdose).
Written by/reviewed by: Kristi Monson, PharmD;Arthur Schoenstadt, MD
Last reviewed by: KristiMonson, PharmD;
List of references (click here):
Jellin JM, editor. Pharmacist's Letter/Prescriber's Letter Natural Medicines Comprehensive Database Web site. Available at: http://naturaldatabase.com/. Accessed October 21 2008.
National Institutes of Health. Office of Dietary Supplements. Dietary supplement fact sheet: Calcium (9/23/2005). NIH Web site. Available at: http://ods.od.nih.gov/factsheets/calcium.asp. Accessed October 13, 2008.
Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Calcium, Phosphorus, Magnesium, Vitamin D, and Fluoride. Washington, DC: National Academy Press, 1999. Available at: http://books.nap.edu/books/0309063507/html/index.html. Accessed October 21, 2008.
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