L-Theanine – Capsules, 12g (200mg/cap)

L-Theanine – Capsules, 12g (200mg/cap)



L-Theanine is a highly bioavailable non-essential amide bioactive amino acids which can help maintain normal sleep, improve memory function and nullify effect of neurotoxins.

L-Theanine also known as L-γ-glutamylethylamide and N5-ethyl-L-glutamine, is an amino acid analogue of the proteinogenic amino acids L-glutamate and L-glutamine and is found primarily in particular plant and fungal species. L-Theanine increases serotonin, dopamine, GABA, and glycine levels in various areas of the brain, as well as BDNF and NGF levels in certain brain areas. It has also been found that injecting spontaneously hypertensive mice with L-Theanine significantly lowered levels of 5-hydroxyindoles in the brain. Researchers also speculate that it may inhibit glutamate excitotoxicity.

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What is L-Theanine?

L-Theanine, is a non-protein amino acid mainly found naturally in green tea (Camellia sinensis) and some mushrooms (Boletus badius). It is the major amino acid in tea, and constitutes 1–2% of its dry weight. L-Theanine works by decreasing the binding of the excitatory neurotransmitter glutamate to its receptors and stimulating the production of the inhibitory neurotransmitter GABA.

L-Theanine Benefits and Uses

Studies have shown that L-Theanine may have the following benefits:

  • Promotes relaxation and lowers stress
  • Supports healthy sleep
  • Promotes memory function

Additional Information on L-Theanine

L-Theanine is a relaxing but not a sedating amino acid, thereby promoting a relaxed sleep. L-Theanine supplementation appears to cause an increase in alpha-1 wave production within 30-45 minutes following oral ingestion of standard supplemental doses. Studies done on rats showed that at feasible dosages, it is able to reduce circulating bio-markers of stress with or without an actual stressor being present, and can reduce the adverse effects of stress such as memory impairment.

Where to Buy L-Theanine?

Botany offers high-quality plant-derived L-Theanine capsules in a quantity of 60 capsules (200mg per capsule). Our L-Theanine has been lab-tested and verified for both product purity and identity.

Suggested Use

For Best Results:

  • Take one capsule orally up to three times daily.
  • Store in a cool, dry place away from light.
  • A 12g jar contains 60 x 200mg capsules.
  • We recommend using a milligram scale to accurately measure dosages.


One Serving (200mg) Contains:

  • L-Theanine 200mg
  • Other Ingredients: Microcrystalline Cellulose
  • No artificial colors, preservatives, or additives.


This product is contraindicated in an individual with a history of hypersensitivity to any of its ingredients.

Consult your physician if pregnant, nursing, have or suspect a medical condition.

Do not use if tamper seal is broken.

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