L-theanine is a calming amino acid that helps transmit nerve impulses in your brain and stimulates relaxing neurotransmitters like GABA. It can be found naturally in certain plants used as teas, mainly green tea leaves. It induces relaxation without drowsiness.
Studies have been done with green tea, a natural source of l-theanine, and have shown that it works well in combination with caffeine. Neuro gum and mints provide l-theanine along with caffeine to give you a balanced boost without the jitters. This compound has also been shown to help boost mood and cognitive performance.
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