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Calcium counter and tracker app icon
Calcium counter and tracker app icon


Calcium Recommended Dietary Allowance (RDA)

Calcium RDA depends on age and sex, see US Dietary Guidelines for Americans 2020–2025. 

  • Calcium deficiency is common if you are on a vegan, milk-free or weightloss diet or if you are pregnant or breastfeeding
  • Excessive intake may have adverse effects.


Use our free Key Nutrients RDA Calculator app to calculate your RDA and use our Calcium Counter & Tracker to ensure an adequate healthy intake.


Calcium is an important mineral throughout the body

Calcium plays key roles in the body but is particularly important for strong bones and teeth, healthy muscle (including the heart) and nerve function and blood pressure, and blood clotting.


Infographic: Key roles of a healthy calcium intake and adverse effects of calcium deficiency

Image of bone and description of effect of calcium deficiency on bone

Strong bones

Inadequate calcium intake weakens bone, leading to osteoporosis and fractures

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Icon of a tooth and description of effect of calcium deficiency on teeth

Strong teeth

Tooth decay, damage and loss can be a sign of calcium deficiency

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Image of muscles and description of effect of calcium deficiency on muscle

Muscle contraction

A lack of calcium is associated with muscle weakness, stiffness, spasms and cramping

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Image of blood clot and description of effect of calcium deficiency on blood clotting
Image of nerve cell and description of effect of calcium deficiency on nerve cell signalling
Image of the heart and description of effect of calcium deficiency on heart rhythm and contraction
Image of blood pressure monitor and description of effect of calcium deficiency on blood pressure
Image of a healthy body and description of effect of calcium deficiency on general body function