Historically, 400 IU (10 ug) of vitamin D was recommended for better health because it closely approximated the amount of vitamin D in a teaspoonful of cod liver oil. However, 800 to 1,000 IU is ...

In fact, The Endocrine Society recommends that adults with vitamin D deficiency be treated with either 50,000 IU of vitamin D once a week for eight weeks or 6,000 IU daily for eight weeks, followed by ...

Experts reveal everything you need to know about vitamin D, from how likely you are to be deficient, to which supplements to buy and how much is enough ...