Vitamin Supplements

Please post the conversion factor between an international unit of a vitamin and its metric equivalent. i.e. how many IU = X milligrams or micrograms? An international unit of a vitamin varies. I use the following table from "Food Chemistry and Nutritional Biochemistry by Zapsalis and Beck. Vitamin A, 1 IU retinol = 0.300 - 0.344...

I have been discussing with doctors this issue of the vitamins, but none could give me that convincing explanation and advice as you did. What you say make a lot of sense i.e. making expensive urine. Thanks a lot. The reason I said you would make expensive urine is your body absorbs about 15% from...