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Now that we have said that, the body needs Amino Acids for many things, and everyone would do well to make sure that they are getting a good supply of them. Most would not require anti-depressant drugs if their Amino Acid levels were normalized. Smoking also is detrimental to Amino Acid levels in the brain, and quitting smoking is aided by increasing Amino Acid intake.
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Setting a goal is not the main thing. It is deciding how you will go about achieving it and staying with that plan. --- Tom Landry