L-Theanine is an amino acid that is naturally found in green tea. However, since green tea usually has less than 10mg of Theanine in it, it's hard to see the benefits of Theanine from just drinking green tea.

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L-Theanine is an amino acid that is naturally found in green tea. However, since green tea usually has less than 10mg of Theanine in it, it's hard to see the benefits of Theanine from just drinking green tea.

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