| http://www.w3.org/ns/prov#value | - ??? people whose exposure to natural sunlight is limited, including those who are housebound and women who wear long robes and head coverings for religious reasons, and ??? people with Crohn's disease, cystic fibrosis and some forms of liver disease, who may have trouble absorbing vitamin D. The recommended daily allowance has recently increased to 600 milligrams per day for someone under age 70,
|
