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L-Theanine 150mg

90 Veggie Caps DRB-00197
  • Helps promote a relaxed state without drowsiness*

  • Helps ease stress and occasional nervous tension*

  • Helps promote a healthy mood and alertness*

  • Helps diminish normal symptoms of pre-menstrual syndrome (PMS)*

  • Non-GMO
  • Gluten Free
  • Soy Free
  • Vegan
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Suggested Adult Use

Each serving contains 150 mg of L-Theanine. Take one veggie capsule daily without food.


Suntheanine can have noticeable benefits with doses as low as 50mg. However, for most adults, doses of 100mg to as much as 400mg or more are often used for greater effects. In doses of 400mg or greater, some people will experience some degree of drowsiness. This is advantageous if you are using Suntheanine to improve sleep quality, but it can be a problem during the day. Doses as high as 1000 mg of Suntheanine are safe but caution should be exercised if taking higher doses when you have to drive or operate machinery.

Doctor's Best products can be found at vitamin specialty, chain and independent natural product stores across the country, as well as online. We recommend that you use our online Where to Buy store finder to find a store near you or one of our online partners who can ship to you directly.

Doctor's Best products are quality tested and manufactured in the United States using highly qualified cGMP manufacturers and raw material ingredients. Doctor's Best sources raw materials from around the world and ingredients are subject to the intense testing and verification regardless of geography of origin.