L-Theanine Capsules

L-theanine is a natural dietary supplement for brain.✝

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Bottle of 120 caps x 200mg



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What is L-theanine?

L-theanine (γ-glutamylethylamide) is nonessential amino acid primarily found in the green tea plant (Camellia sinensis).1 It is now believed that L-theanine gives tea its distinctive aroma and taste.

L-theanine is a phytochemical, which chemically is similar to glutamate, an important neurotransmitter. It also affects neurotransmission at least two other very important neurotransmitters – serotonin and dopamine.

Therefore, because of its structure and functions, L-theanine may have positive effects on cognition and mood. For example, dopamine is linked with any rewarding activities, whereas serotonin is often called a “happy” neurotransmitter directly involved in mood regulation.

Thus, the balanced levels of these neurotransmitters are required for a stable and generally healthy mood. L-theanine is also a relaxing agent, which may have a number of practical implications when managing anxiety.

Generally, L-theanine has unique therapeutic properties that may be able to modulate the brain function and provide a range of health benefits.

Key benefits:

  • Promotes relaxation without sedation
  • Improves mood
  • Reduces stress
  • Increases general alertness
  • Sleep aid

Mechanisms of action:

L-theanine is easily absorbed from the gastrointestinal tract, transported to the brain where it crosses the blood-brain barrier (BBB) and starts to alter neurochemicals, including inhibition of glutamate reuptake, increase in GABA, dopamine, and BDNF.2

Recommended dosage of L-theanine:

The recommended daily dosage of L-theanine is 200 mg. L-theanine reaches its peak levels 30-120 min after oral administration.

Side effects:

L-theanine is a safe dietary supplement. No adverse side effects have been reported following the use of the recommended dose of L-theanine. However, higher dosages may lower the blood pressure, which has important implications for those people who take any type of high blood pressure (hypertension) medication as if used in combination the blood pressure can drop to a dangerous level.

Supplement facts:

Serving size: 1 capsule

Servings per bottle: 120

Amount per serving: L-theanine 200 mg

Other ingredients: Magnesium Stearate; Silicon Dioxide

This product is free from: Artificial Flavours, Colours & Preservatives, Lactose, Yeast & Gluten

Suitable for: Vegetarians and Vegans


  • Dietary supplements should not be used as a substitute for a well-balanced and healthy diet.
  • Store in a cool dry place, out of reach of children.
  • Do not use if you are pregnant or breastfeeding.


  1. L-theanine: properties, synthesis and isolation from tea
  2. Anti-Stress, Behavioural and Magnetoencephalography Effects of an l-Theanine-Based Nutrient Drink: A Randomised, Double-Blind, Placebo-Controlled, Crossover Trial


✝ These statements have not been evaluated by the Food and Drug Administration (FDA) The above products are not intended to diagnose, treat, cure or prevent any disease. You should consult a physician before taking a new product or a supplement. This product should not be taken by pregnant or nursing mothers, people suffering from cardiovascular disease or those under 18 years of age.

Any studies cited here are not conclusive and are limited to their closed environment nature; they might not determine ones experience with a supplement, due to a large number of unaccounted variables falling outside the scope of such studies.

The reviews available here are the opinions of contributors who may or may have not used these products, and do not necessarily represent the views of Orbivit. These reviews represent one’s opinion and should not be taken as fact or recommendation. Orbivit makes no warranty to the accuracy of information provided by these reviews. Read legal disclaimer