Correct3 Vitamin D3 Calculator

• Estimated Need is calculated by body weight X 1000 IU / pound.  As most people have large gaps and benefit from more vitamin D3, the figure is rounded up to the nearest 1000 IU.


• Note the recommended daily Upper Tolerable limits for ages 1=8 is 2500 IU and ages 9+ 4000 IU.  Numerous experts recommend higher doses for overweight and larger bodies.


• To put vitamin D3 dosages into context, one hour exposure to sunlight in summer may produce 10,000 to 25,000 IU of vitamin D for a light-skinned person wearing a bathing suit. However, the amount of vitamin D3 from sun can vary considerably due to time of day, season, latitude, age, sunscreen use, skin pigmentation and total skin exposed. *Vitamin d: a d-lightful solution for health" Michael F. Holick 2011