Good quality meal replacement bars.

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syntha 6 bars

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THere are really only two bars on the market that are actually good for you and will give you a large hit of protein....

The optimum nutrition Bar

http://www.optimumnutrition.com/prod...bar-p-272.html

And the Quest bar in chocolate and a few other flavors:

http://www.questproteinbar.com/

If you really want to go with something that is a little cheaper or more widley available, you could do alot worse than the clif bar brand Builder bar:

http://www.clifbar.com/food/products_builders/

you need to pay very close attention to the nutrition facts on these things, i dont know if your a body builder or compete in anything, but I am very much a fitness enthusiast and have researched this stuff at length. The other reccomendation I would make to you is jerky and almonds, they may not be a bar but they are convenient and great for you. Good luck.