Doctor's Best Suntheanine® L-Theanine -- 150 mg - 90 Vegetarian Capsules 3 5 1 2

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

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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.