IMO, believing in vitamins is falling into the traps set by tv commercials. I've lived a long, healthy life, some of it in very adverse conditions, and never felt the need for vitamins or supplements. I've said this before and will repeat it again here: the entire world susbists on FIVE basic foods---wheat, rice, beans, potatos, and corn. A combo of any two of them with a bit of meat or fish added and our amazing digestive systems can and will synthesize any nutrient needed. Spending money for vitamins is very like buying crap to put in your car's gas tank to increase the mileage and they don't work either....