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Resource Description

L-Theanine is an amino acid naturally found in tea leaves, particularly in green tea (Camellia sinensis). It is known for its calming and relaxing effects on the body and mind. L-Theanine is structurally similar to the neurotransmitter glutamate and is believed to modulate neurotransmitter levels in the brain.

Here are some key points about L-Theanine:

  1. Calming Effects: L-Theanine has been shown to promote relaxation without causing drowsiness. It can help reduce feelings of stress and anxiety by promoting alpha brain wave activity, which is associated with a state of wakeful relaxation.

  2. Enhanced Cognitive Function: Some studies suggest that L-Theanine may improve cognitive function, including attention, focus, and memory. It is often combined with caffeine for its ability to counteract the jittery effects of caffeine while still promoting alertness and mental clarity.

  3. Neurotransmitter Modulation: L-Theanine affects various neurotransmitters in the brain, including gamma-aminobutyric acid (GABA), serotonin, and dopamine. It may increase levels of these neurotransmitters, which are associated with mood regulation and relaxation.

  4. Stress Reduction: L-Theanine has been shown to reduce physiological and psychological stress responses, such as lowering heart rate and blood pressure and improving subjective feelings of stress and anxiety.

  5. Sleep Quality: Some research suggests that L-Theanine may improve sleep quality by promoting relaxation and reducing anxiety before bedtime. It may help individuals fall asleep faster and experience deeper, more restful sleep.

  6. Safety and Side Effects: L-Theanine is generally considered safe when taken at recommended doses. It is well-tolerated and does not typically cause adverse effects. However, some individuals may experience mild side effects such as headaches or gastrointestinal discomfort.

L-Theanine supplements are available in various forms, including capsules, tablets, and powders. It is also naturally present in tea, particularly green tea, although the exact concentration can vary depending on factors such as tea variety and preparation method.


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