as far as vitamins go, the most important ones are vitamin C and B because they are water soluable, so your body doesn't store those. The fat soluable ones can

as far as vitamins go, the most important ones are vitamin C and B because they are water soluable, so your body doesn't store those. The fat soluable ones can be stored in your body for a very long time (A,D,E,K), so you don't need to worry about those as much in times of fasting.