The combination of L-theanine and caffeine improves cognitive performance and increases subjective alertness

The combination of L-theanine and caffeine improves cognitive performance and increases subjective alertness

Author: T. Giesbrecht, and J.A. Rycroft, and M.J. Rowson and E.A. De Bruin

The non-proteinic amino acid L-theanine and caffeine, a methylxanthine derivative, are naturally occurring ingredients in tea. The present study investigated the effect of a combination of 97 mg L-theanine and 40 mg caffeine as compared to placebo treatment on cognitive performance, alertness, blood pressure, and heart rate in a sample of young adults (n = 44). Cognitive performance, self-reported mood, blood pressure, and heart rate were measured before L-theanine and caffeine administration (i.e. at baseline) and 20 min and 70 min thereafter. The combination of moderate levels of L-theanine and caffeine significantly improved accuracy during task switching and self-reported alertness (both P < 0.01) and reduced self-reported tiredness (P < 0.05). There were no significant effects on other cognitive tasks, such as visual search, choice reaction times, or mental rotation. The present results suggest that 97 mg of L-theanine in combination with 40 mg of caffeine helps to focus attention during a demanding cognitive task.

 

 

Get the whole article here

Shipping Icon Free Shipping + Free Returns
Subscription Details Icon
We stand behind our teas and teaware, and want you to be not just satisfied with them, but thrilled. If for any reason you're not, just let us know and we'll do our best to make it right.

{property.value} {property.value} {property.value} Include jar: {property.value}
×
You definitely need tools!
Perfect coldbrew everytime
The ideal way to store your matcha
The ideal way to store your matcha