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 a vitamin supplement, assuming you don’t have a deficiency for a particular nutrient. The rest is excreted in your urine.