Safety of Calcium

Specific Warnings and Precautions

Warnings and precautions to be aware of concerning the safety of calcium include the following:
 
  • Check with your healthcare provider before taking calcium if you have kidney disease, as kidney disease increases the risk of having high levels of calcium in the blood (hypercalcemia).
     
  • If you have any problems with phosphate levels in the blood (either high or low levels), take calcium only with your healthcare provider's approval and supervision. Calcium can make low phosphate levels worse. If you have high phosphate levels, taking too much calcium could increase the risk of developing calcium phosphate deposits in soft body tissues.
     
  • Low stomach acid levels can decrease the absorption of calcium. This is common in elderly individuals and in people taking acid reducer medications. This problem can be avoided by taking calcium citrate instead of calcium carbonate, although taking either form of calcium with a meal may also work just as well (since food stimulates stomach acid production).
     
  • Some medical conditions, such as sarcoidosis and hyperparathyroidism, can increase calcium absorption. If you have one of these conditions, check with your healthcare provider before taking calcium.
     
  • Calcium may cause or worsen kidney stones in some people. If you have had a kidney stone, consult with your healthcare provider about whether you should take calcium.
     
  • Calcium can interact with some medications (see Calcium Drug Interactions for more information).
     
  • Normal intakes of calcium are safe for pregnant or breastfeeding women (see Calcium and Pregnancy and Calcium and Breastfeeding).
     
Lifestyle Changes to Help Your Bones

Calcium Supplement Information

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