In spite of what has been said about the need for sunshine, people will not choose it for various reasons. These people will need to depend on a supplement. This needs to be D3, the same as getting sun. D2, which is synthetic and harmful, is often prescribed by doctors and is used as fortification in milk & cereals. D3 is found naturally in eggs & animal fat. Unlike the sun (D3), which can’t be overdone as long as we don’t burn, the supplement can be overused. The need for a daily dose is 3800 IU daily for people with adequate blood levels, 5000 IU for those deficient.
To determine a deficiency, we need to be tested at least once a year by ordering the Vitamin D, 25-Hydro blood test. In spite of what the range says, we should never be below 82. Below 50 is serious deficiency, with optimal range between 115-128.
