title: Calcium requirements in humans. Report of original data and a review.
abstract: Presently submitted and previously available data indicate that the recommended calcium requirement of 800 mg/day is inadequate for a large segment of the population, particularly the elderly. With an intake of 800 mg of calcium/day, calcium balance was only slightly positive, without consideration of dermal losses or other risk factors that may play a role in calcium bioavailability and calcium retention. A calcium intake of 1000-1200 mg/day is preferable, as calcium balance increased significantly when calcium intake was increased from 800 to 1200 mg/day; there was no further improvement in calcium balance on higher calcium intakes, up to 2300 mg/day.
mesh_terms: D000222:Adaptation, Physiological; D000293:Adolescent; D000328:Adult; D000368:Aged; D000536:Aluminum Hydroxide / Q000494:pharmacology; D000863:Antacids / Q000494:pharmacology; D002118:Calcium / Q000378:metabolism; D002125:Calcium Gluconate / Q000008:administration & dosage; D002136:Calcium, Dietary / Q000008:administration & dosage*; D004338:Drug Combinations / Q000494:pharmacology; D005260:Female; D006801:Humans; D007408:Intestinal Absorption; D008276:Magnesium Hydroxide / Q000494:pharmacology; D008297:Male; D008875:Middle Aged; D009751:Nutritional Requirements; D010024:Osteoporosis / Q000378:metabolism; D010758:Phosphorus / Q000378:metabolism
chemical_list: D000863:Antacids; D002136:Calcium, Dietary; D004338:Drug Combinations; D010758:Phosphorus; C013591:aluminum hydroxide, magnesium hydroxide, drug combination; D000536:Aluminum Hydroxide; D008276:Magnesium Hydroxide; D002125:Calcium Gluconate; D002118:Calcium