Calcium and magnesium.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging; D001842:Bone and Bones / Q000502:physiology; D002118:Calcium / Q000172:deficiency / Q000378:metabolism; D002136:Calcium, Dietary / Q000009:adverse effects; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008274:Magnesium / Q000009:adverse effects / Q000378:metabolism; D008275:Magnesium Deficiency; D008286:Malabsorption Syndromes / Q000150:complications; D008297:Male; D008875:Middle Aged; D009751:Nutritional Requirements; D010024:Osteoporosis / Q000209:etiology / Q000378:metabolism; D011247:Pregnancy
D002136:Calcium, Dietary; D008274:Magnesium; D002118:Calcium