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Calcium
Most abundant mineral in the body (99% in bone and teeth), essential for skeletal mineralization, neuromuscular function, blood clotting (factor IV), and intracellular signaling.
Also: Ca
Adult RDA is 1,000-1,200 mg/d depending on age and sex. Absorption is by active transcellular (vitamin D-dependent, dominant at low intake) and passive paracellular pathways. Bioavailability is highest from dairy and low-oxalate vegetables. Excess intake (>2,000 mg/d) has been associated with kidney stones and possibly cardiovascular events, though the latter remains contested. Postmenopausal women, individuals with lactose intolerance, and vegans are at highest risk for inadequate intake.
How each textbook covers it
duyff-complete-food-and-nutrition-guide-5e
Modern Nutrition in Health and Disease, 12th ed. — Ch 7: Calcium
Adult RDA is 1,000-1,200 mg/d depending on age and sex. Absorption is by active transcellular (vitamin D-dependent, dominant at low intake) and passive paracellular pathways. Bioavailability is highest from dairy and low-oxalate vegetables. Excess intake (>2,000 mg/d) has been associated with kidney stones and possibly cardiovascular events, though the latter remains contested. Postmenopausal women, individuals with lactose intolerance, and vegans are at highest risk for inadequate intake.
Related terms
Calbindin, Osteoporosis, PTH, Vitamin D