In adults, the dietary allowance for vitamin D is 600-800 IU (International Units) a day, varying with age and medical conditions. Toxicity usually occurs when intake is more than 4,000 IU daily ...

Vitamin D is vital to the prevention and treatment of osteoporosis because it helps your body absorb calcium. Most people need about 400 to 800 international units (IUs) of vitamin D each day, though ...

We now believe that women need at least 800 units a day of D3, cholecalciferol. That's the stuff our bodies make. Vitamin D pills, multi-vitamin pills and calcium pills may contain D, but you want ...

There have been many proven benefits of vitamin D and how it helps maintain a healthy immune system; however, as we spend less time in the sun, our ability to naturally make it declines.