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…plants. L-tryptophan is known as an essential amino acid. This classification means that the body cannot produce it and it must be acquired by food intake. It has been used as an aid to treat insomnia, depression, anxiety, PMDD, and ADD. It has also been used as an assist to smoking cessation, although not all of these uses have been approved by the FDA. It should not be used as a substitute for prescribed medications. It has also been implied…

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