Theanine

4 min readEvidence-linked topicGreen Medicine Encyclopedia

Overview

Theanine is an amino acid that influences neurotransmitters. It occurs naturally in black and green tea leaves (Camellia sinensis) and contributes to the calming effects many people feel when drinking a hot cup of freshly brewed tea. Research on L-theanine shows that it boosts the effects of GABA, a neurotransmitter that acts like a "brake" during stress. For sleep, L-theanine is most helpful when a busy mind and occasional anxious feelings keep you awake.

Health Benefits of Theanine

Cardiovascular System

 Theanine may help to prevent abnormal Blood Clotting by inhibiting the ability of Thrombin to initiate Blood Clotting.  Anecdotal Evidence

 Theanine may lower Blood Pressure in High Blood Pressure patients.  [1]

 Theanine may help to prevent (ischemic) Stroke and may help to minimize Memory impairment after the occurrence of (ischemic) Stroke.  [2]

Immune System

 Theanine may help to prevent/treat Cancer - Lung.  [3]

 Theanine may enhance the effectiveness of Doxorubicin in the treatment of Cancer - Ovaries.  [4] 

Metabolism

 Theanine may inhibit Exercise - Endurance-induced suppression of the Immune System.  [5]

 Theanine may inhibit the ability of Alcohol to damage the Liver.  [6]

Keep reading Theanine

  • Nervous System
  • Sexual System
  • Theanine may enhance the Function of these Substances
  • Neurotransmitters
  • Theanine may counteract these Potentially Toxic Substances
  • Amino Acids
  • 5 more sections
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