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Is Calcium Citrate Effective?

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).

Dosing 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.
(Click Calcium Dosage for more information.)

Drug Interactions

Calcium citrate can potentially interact with numerous different medications (see Calcium Drug Interactions).

What If I Take a Calcium Citrate Overdose?

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).
(Click Calcium Overdose for more information.)
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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