I need a vitamin pill that really increases my performance at my job, does anyone knows a reliable one?

i work as a valet (valet parking) and i am a full time student, i tend to get tired more often, and i really feel like im out of energy some times. i need something that my body is going to absorb almost entirely, i don't believe on the grocery store ones, like pharmaton, centrum etc etc.
Answers:    have you ever considered liquid ? all natural have a look
http://www.completeliquidvitamin.com/400...
don in fl
go to health food store & buy one called "Perfect Food" by Garden of Life.
First, don't cheat your body of sleep. This is necessary to rebuild the body and relax the mind. Second, try vitamin B.
You need more sleep most likely. Brewers yeast has a wide range of B vits. Can be had from most healthe food stores and Puritan.com.

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