EzineArticles.com: There are vital amino acids, which are ones that you MUST get from the diet because your body cannot produce them, and there are non-essential amino acids that your body already has enough of. Protein helps support lean muscle tissue, aids in the production of hormones and enzymes and supports immune function. Exercising individuals have higher daily protein requirements than inactive individuals, since exercise increases the body’s need for protein

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Top 10 Protein Foods For Six Pack Abs