Doctor's Best Suntheanine® L-Theanine

Doctor's Best Suntheanine® L-Theanine -- 150 mg - 90 Vegetarian Capsules

In stock
  • Quantity: 

Enjoy our low price guarantee and never run out with Set & Save.

Added to My List as a guest*.

*Your guest list will be temporarily saved until you end this browser session.

1 item added to your list

Doctor's Best Suntheanine® L-Theanine -- 150 mg - 90 Vegetarian Capsules

Oops! Something went wrong and we were unable to process your request. Please try again.

Supplement Facts
Serving Size: 1 Capsule
Servings per Container: 90
Amount Per Serving% Daily Value
Suntheanine® L-theanine150 mg*
*Daily value not established.
Other Ingredients: Rice powder, vegetable capsule.

Doctor's Best Suntheanine® L-Theanine Description

  • Amino Acid L-Theanine Supplement
  • Relaxation Without Drowsiness
  • Reduces Stress and Tension

Suntheanine® is the premier, patented form of the amino acid L-theanine. Suntheanine® is the purest for of L-theanine on the market today. L-theanine is an amino acid derived from green tea that is responsible for the relaxation-inducing effect of tea consumption. Suntheanine® has been shown to promote an alert state of relaxation. This is characterized by an increase in alpha brain waves (signifying a relaxed, alert state) and a decrease in beta brain waves (signifying an awake, excited state of mind). Suntheanine® may also improve sleep quality, enhance mental acuity and soothe away tension and nervousness.

  • Promotes a relaxed state without drowsiness
  • Eases stress and everyday nervous tension
  • Promotes a positive mood and alertness


One capsule daily, or as directed by a health care professional.
These statements have not been evaluated by the FDA. These products are not intended to diagnose, treat, cure, or prevent any disease.
Doctor's Best Suntheanine® L-Theanine -- 150 mg - 90 Vegetarian Capsules 4.2 5 4 5
Good product This is a clean product compared to some (less inactivive ingredients), lower milligram capsules gives freedom to adjust the dosage. July 1, 2014
Reduces stress This product is worth looking up and looking into especially if you are looking for stress relief. It does not have a single adverse affect. I love it! I think Doctor's Best is a great brand too!! January 11, 2014
Helps with Insomnia I found that this helped me relax more before bedtime. I take it about an hour before turning in. June 18, 2013
I was Disappointed I have tried several other L-Theanine products. This was supposed to be 'pure' and therefore better!?! At 150 mg I figured I could get away with one. Basically it had no effect, at least not first thing in the morning for my concentration problem. If I took two it worked adequately, but seemed to wear off faster then the others. I have found that two work adequately as an afternoon booster. It is at least helping me to use them up. I think I will go back to the Theanine Serene. I use it mainly for concentration as I tend to get distracted easily. July 29, 2010
1-5 of 5
Know someone who would love this product? Don’t keep it a secret – share it now!
Note: Your friend's email address is used for this one-time notification only. We will not collect or store or share it with any other parties.
Friend's Name:
Your Name:
Friend's Email:
Your Email:
Message to your friend: (optional, max 500 characters)
Change the CAPTCHA codeSpeak the CAPTCHA code
Enter the code exactly as shown: 
Enter Shipping Zip Code:
Please enter a valid zip code