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Calcium Recommended Dietary Allowance (RDA) depends on age and sex (US Dietary Guidelines for Americans 2020–2025). Excessive intake may have adverse effects.


Calcium is needed for:

Use FLMC's Calcium Counter & Tracker to avoid calcium deficiency (which is common if you are on a vegan, milk-free or weightloss diet or if you are pregnant or breastfeeding). Calcium deficiency results in:

  • Weakened fracture-prone bones and teeth
  • Impaired muscle function with muscle cramps and spasms
  • Impaired heart function