I started taking Centrum women's vitamins last month; I admit to being lax about it. I am going to take one now, that you brought it up. My diet.. could be better. Mainly centers around alot of carbs and convenience food that I get at work; I know, that is not good.. it could be contributing to this.
I think that my attraction to carbs, is fueled by little energy. Like "if I carb-load, I might get more energy.." which I guess does not work.