The doses we are talking about 800 to 1200 units ... What does that mean? Vitamin D2 is from plants, it's ergocalciferol. It comes from plants that are irradiated by sunlight, and a lot of ...

However, 800 to 1,000 IU is the dose that may have a better chance of giving a patient a normal vitamin D level. In some countries, vitamin D is listed in micrograms, and the relationship is as ...

When is the best time to take vitamin D supplements? Dietitians explain if you should take it with food, and if you should ...