In some countries, vitamin D is listed in micrograms, and the relationship is as follows: 2.5 mcg (micrograms) = 100 IU. 5 mcg = 200 IU. 10 mcg = 400 IU. 15 mcg = 600 IU. 20 mcg = 800 IU.
Taking even high doses of supplementary vitamin D won't lower an older person's odds for type 2 diabetes, new research confirms. Vitamin D supplements may have other benefits, but in otherwise healthy ...