L-Theanine with Suntheanine®


Amino acid found in green tea to support relaxation, focus, memory and a healthy stress response. read more

150 in stock





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Product overview

L-Theanine is a unique amino acid found in green tea that supports relaxation, mental focus and a healthy stress response. This formula contains Suntheanine®, a patented form of L-theanine that has been the subject of numerous safety studies and human clinical research. Research has shown that supplemental L-theanine crosses the blood-brain barrier within 30 minutes of intake and exerts its effects directly on the brain. L-Theanine is best known for its unique ability to support relaxation without causing drowsiness.

  • Helps support a relaxed state without drowsiness, stress and occasional nervous tension.
  • Balances a healthy mood and supports alertness.
  • May support healthy hormonal balance in women.
About Doctor’s Best

Doctor’s Best creates vitamins and supplements using science-based techniques that combine natural ingredients using thoroughly researched and tested methods. Doctor’s Best is committed to transparency and education, and uses only certified cGMP facilities to ensure the highest quality standards are met.


L-Theanine (from Suntheanine®) 150 mg. Other ingredients: Microcrystalline cellulose, hypromellose (vegetarian capsule).

Does not contain: GMO, Gluten, Soy

Suggested Use

Recommended intake:

Suggested Adult Use: Take one capsule daily without food or as directed by a healthcare practitioner.

  • If pregnant, nursing or taking medications, consult a healthcare practitioner prior to use.
  • Store in a cool dry place.
  • Do not use if safety seal is broken or missing.
  • Keep out of reach of children.
  • Always read the label and use as directed. If symptoms persist see your healthcare practitioner.


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