On Nov. 20, the Institute of Medicine released a report that said Americans from 9 to 70 need 600 international units (IUs) of vitamin D a day. That recommendation triples the previous recommended dietary allowance of 200 IUs. The report also stated that those 71 and older may need as much as 800 IUs.
In addition to increasing the daily amount of vitamin D, the report also doubled the amount of vitamin D that people in the 9 to 70 age group can safely take per day, from 2,000 to 4,000 IUs.
Researchers also dealt with calcium, another important element in bone health, stating that children from 1 to 3 should receive 700 milligrams per day, children 4 to 8 should receive 1,000 milligrams per day, adolescents 9 to 18 should receive 1,300 milligrams per day, and adults from 19 to 50 (or 70 for men) should receive 1,000 milligrams per day. Beginning at age 51, women should receive 1,200 milligrams. That same level was recommended for both men and women older than 71.