The market for supplements, such as L-theanine, believed to enhance mood naturally, is booming, but do they really work? The recent news about mental health in the United States, such as the data found in The State of Mental Health report for 2021 (Mental Health America), is striking.
Today we will look at L-theanine, an amino acid said to ease anxiety, stress, and insomnia. L-theanine is found in tea (black and green) and some varieties of mushrooms. The proposed actions of L-theanine are based on its chemical structure, which is very similar to that of glutamate, a naturally occurring amino acid involved in nerve transmission in the brain.
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