The report also notes that taking more than 4,000 IU of vitamin D daily (up from 2,000 IU) or 2,000 mg of calcium daily (down from 2,500 mg) increases the risk for harm. The 2010 recommendations update those set in 1997. Women, beginning at age 51, and both men and women over age 71, need 1,200 mg of calcium a day, the same as in 1997. Men need 1,000 mg daily until age 71, down from 1,200 mg in 1997. Men and women 71 and older need 800 IU, up from 600 IU. Adults up to age 70 need 600 IU (international units) daily, up from 400 IU in 1997.
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