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Calcium — Frequently Asked Questions

This content is for informational purposes only and does not constitute medical advice. Consult your healthcare provider before starting any supplement. Full disclaimer

Frequently Asked Questions

Is calcium citrate better than calcium carbonate?

Calcium citrate is generally preferred because it absorbs well with or without food and does not require stomach acid. This makes it ideal for older adults and those on proton pump inhibitors. Calcium carbonate has more elemental calcium per pill and is cheaper, but must be taken with food for adequate absorption.

Can calcium supplements cause heart problems?

Some meta-analyses have suggested a modest increase in cardiovascular events with high-dose calcium supplements (>1,000mg/day), but this remains controversial. The American Society for Bone and Mineral Research concluded that calcium supplements at recommended doses are safe. To minimize any theoretical risk, get calcium from food first and keep supplemental doses at 500-600mg.

Should I take calcium with vitamin D?

Yes. Vitamin D increases intestinal calcium absorption from about 10-15% to 30-40%. Without adequate vitamin D, even high calcium intake may not effectively support bone density. Most bone health experts recommend 1,000-2,000 IU vitamin D3 daily alongside calcium supplementation.

Full Calcium Guide

References

  1. (). Calcium plus vitamin D supplementation and the risk of fractures. New England Journal of Medicine. DOI
  2. (). Calcium intake and risk of fracture: systematic review. BMJ. DOI
  3. (). Calcium intake and bone mineral density: systematic review and meta-analysis. BMJ. DOI