0-6 Months         210 milligrams / day

7-12 Months       270 milliframs / day

1-3 years            500 milligrams / day

4-8 years            800 milligrams / day

9-18 years         1300 milligrams / day

19-50 years       1000 milligrams / day

50+ years          1200 milligrams / day