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What should I do if I overdose on calcium?

Calcium supplements are generally nontoxic, but if you take too much, you may feel sick. You could have a stomachache, get constipated or have diarrhea, develop a headache or find your heart beating irregularly. Call your doctor or Poison Control (1-800-222-1222) for advice.

A greater concern than a single overdose is getting too much over a long period of time. Some research suggests that taking more than 1,000 or 1,200 milligrams (mg) of calcium a day may, over time, increase the risk of a heart attack. Research is continuing to try to confirm or dismiss that concern. Other studies suggest that getting even more calcium (more than 2,000 mg per day) through diet may increase the risk of prostate cancer.

Calcium is found in many foods and over-the-counter antacids. Consider all the sources of calcium in your diet and supplements to make sure you are not taking too much.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.