I work very long days and don't always do the healthy choices.  Not too long ago I went to the doctor - just feeling blah and tired all the time.  I know with my schedule I don't always eat right.  After taking test he suggested I start a multi vitamin.  I tried several different vitamins for several months straight - never felt a difference.  I was getting frustrated and decided to try one last one - Centrum Silver Tablets.  I avoided them at first because I am not yet 50 - although I am so close I can feel it breathing down my neck!  I have been taking them for several months now and...