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L-Theanine is a unique amino acid present in ordinary tea leaves that has been proven to relax the mind without causing drowsiness. It is noted to promote the release of dopamine, which is noted to increase the physiological activity of dopamine in the brain
When taken in combination with caffeine, L-theanine may relieve depression, enhance memory, focus, and overall cognitive performance. It can be a better replacement of caffeine and can reduce the side effects of caffeine.L-theanine can be chemical synthesis to purity as 99% and also can be extracted from natural green tea which purity around 40%-60%. Nature L-theanine’s price is relatively very high than compound one, and the main market normally used compound one due to cost-efficient.


Over the counter in the drugstore and belongs to dietary supplement in the US, UK, and most EU countries.

Specification: L-Theanine ≥99%

White crystalline powder,Soluble in water.

L-Theanine Effects

  • Reduces Stress and Anxiety
  • Improves Memory, Attention, and Mood
  • Improves Sleep
  • Reduces Blood Pressure
  • Improves the Effectiveness of Cancer Treatment

Dosage and Stack


L-Theanine has been shown to interact positively with caffeine and is often taken with caffeine in a 2:1 ratio, particularly when used as a cognitive enhancer. Doses of 100–200 mg L-theanine and 50–100 mg caffeine are considered typical and are generally both effective and well tolerated.

Dosage form application

  • Pure powder form without excipients for research use.
  • Tablet or capsule for prescription use.
  • Liquid for an enegry drink.



Why buy L-theanine from Nootropicsorigin?

We provide high purity product from GMP factory, low MOQ, and competitive price, also provide you best delivery solutions, and we know all countries policies to this kind of medical ingredients.