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©2013 UpToDate ® Print Email Dietary requirements relevant for bone health in cystic fibrosis, other than vitamin D Age Calcium* Phosphorus* Magnesium* Vitamin K • Recommended daily intake 0 to 6 months 200 mg 100 mg 30 mg 0.3 to 0.5 mg 7 to 12 months 260 mg 275 mg 75 mg 0.3 to 0.5 mg 1 to 3 years 700 mg 460 mg 80 mg 0.3 to 0.5 mg 4 to 8 years 1000 mg 500 mg 130 mg 0.3 to 0.5 mg 9 to 13 years 1300 mg 1250 mg 240 mg 0.3 to 0.5 mg 14 to 18 years (boys) 1300 mg 1250 mg 410 mg 0.3 to 0.5 mg 14 to 18 years (girls) 1300 mg 1250 mg 360 mg 0.3 to 0.5 mg Adults (men) 1000 mg 700 mg 400 mg 0.3 to 0.5 mg Adults (women) 1000 mg 700 mg 310 mg 0.3 to 0.5 mg This table outlines the dietary requirements of calcium, phosphorus, magnesium and vitamin K for individuals with cystic fibrosis, each of which is relevant for bone health. Dietary requirements of vitamin D for individuals with cystic fibrosis are presented in a separate table. * Dietary reference intakes (DRIs) for calcium, phosphorus and magnesium are the same as for a healthy population; these data are available at www.nap.edu . For these nutrients, the values shown for infants are adequate intakes (AIs), and the values for older children are recommended dietary allowances (RDAs).  • Vitamin K intake recommendations for patients with cystic fibrosis from: Borowitz D, Baker RD, Stallings V. Consensus report on nutrition for pediatric patients with cystic fibrosis. J Pediatr Gastroenterol Nutr 2002; 35:246.