carbs vs. protein
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I think this handout is very helpful: http://www.ideafit.com/files/BellWilson%2CJenna_ProteinsCarbsandFats_248….
They body needs both and are necessary for a healthy diet. Good articles:
http://www.menscience.com/Proteins-vs-Carbs_ep_151.html
http://www.fitnessandfreebies.com/food/articles/proteinvscarbs.html