Calcium (Ca) is the most common mineral in the human body. More than 99% of total body calcium is stored in the bones and teeth; the remaining 1% is found throughout the body in blood, muscle, and the fluid between cells (1).

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Health Functions

Calcium is involved in maintaining healthy bones, blood vessel function and nerve impulse transmission, and the absorption of micronutrients.

Disease Risk Reduction

Osteoporosis is a bone disorder affected by many factors. With it, bone strength is considerably reduced. Osteoporosis is most prevalent among white postmenopausal women (10).

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Things to know about Calcium

  • Other Applications

    An analysis of 23 large observational studies found a reduction in systolic blood pressure of 0.34 millimeters mercury (mm Hg) per 100 mg calcium consumed daily and a reduction in diastolic blood pressure of 0.15 mm Hg per 100 mg calcium (25).

  • Intake Recommendations

    The recommended dietary allowance (RDA) of calcium is dependent on age, gender, and other factors.

  • Supply Situation

    According to nutrition surveys of five European countries, the average calcium intake is 884 mg/day for adult men, and 786 mg/day for women (43).

  • Deficiency

    Long lasting calcium deficiency may prevent optimal skeletal development, contribute to accelerated bone loss and to the development of osteoporosis.

  • Sources

    Foods high in calcium (Ca) include dairy products like milk, yogurt, and cheddar cheese. Tofu is also a source of calcium.

  • Safety

    Abnormally elevated blood calcium ('hypercalcemia') has been reported only with the consumption of large quantities of calcium supplements (1.5 to 16.5 g/day), usually in combination with calcium carbonate ('antacids') and milk to treat open, painful wounds in the stomach ('peptic ulcers') (1).

  • References

    Consult the full list of scientific references.