you take those vitamins because someone, somewhere at some time was pushing them as an amazing cure. I take Vitamin D personally because a blood test showed th

you take those vitamins because someone, somewhere at some time was pushing them as an amazing cure. I take Vitamin D personally because a blood test showed that I was Vitamin D deficient and my doctor recommended that I take 1000 I.U. of Vitamin D daily to bring myself up to a non-deficient state.