Combination of caffeine and L-Theanine (in extract form)

Combination of caffeine and L-Theanine (in extract form) 

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Combination of caffeine and L-Theanine (in extract form) 
Posted in 2015

The aim of this study was to compare 50 mg caffeine, with and without 100 mg L-theanine, on cognition and mood in healthy volunteers. The effects of these treatments on word recognition, rapid visual information processing, critical flicker fusion threshold, attention switching and mood were compared to placebo in 27 participants. Performance was measured at baseline and again 60 min and 90 min after each treatment (separated by a 7-day washout). Caffeine improved subjective alertness at 60 min and accuracy on the attention-switching task at 90 min. The L-theanine and caffeine combination improved both speed and accuracy of performance of the attention-switching task at 60 min, and reduced susceptibility to distracting information in the memory task at both 60 min and 90 min. These results replicate previous evidence which suggests that L-theanine and caffeine in combination are beneficial for improving performance on cognitively demanding tasks.
L-theanine is an amino acid extracted from the leaves of camellias sinensis — the fancy-pants name for the common tea plant. It’s actually responsible for some of the savoury notes in green tea and is a common relaxant, often mixed with other natural supplements to induce feelings of calm and relaxation.
Also known as a nootropic — a cognitive enhancing drug (and 100% legal, in this case) — theanine can help improve cognitive function. However, it’s most significant benefit is it’s ability to reduce mental fatigue and stress in humans.
L-theanine affects the brain in a number of ways. It is known to amplify alpha brain waves, allowing for a type of calm alertness and even heightened creativity.
It’s also a natural anxiolytic , meaning it reduces anxiety in humans, and can even reduce blood pressure and a hastened heart rate. It does this by reducing levels of stress hormones like cortisol.
Theanine has also been shown to boost levels of GABA, as well as other hormones and compounds that promote calm, focus, regulated mood, and more.
By itself, l-theanine is effective nootropic. But when combined with caffeine…there’s a pronounced synergistic effect. This means you experience heightened focus, awareness, and energy, as well as reduced stress and improved mental endurance to even higher levels.
Again, sounds too good to be true, right? There must be some negative side effects.
Luckily, l-theanine has been shown to have basically zero levels of toxicity, dependency, or tolerance, meaning you could theoretically take large doses every day without negative side effects. Personally, I enjoy l-theanine as a sleeping aid in higher doses (500 mg or so). When combined with the ketogenic diet, I’ve had some of my deepest, most restful sleeps when supplementing l-theanine.
L-theanine’s mechanisms aren’t all completely understood yet, but they’re very well documented. I suggest you do a little research and see for yourself; it’s the safest nootropic out there, even more so than the caffeine from your coffee.
Consuming this combination of caffeine and L-Theanine (in extract form) has been found to help reduce mental fatigue while increasing reaction time and working memory. When taken over time (e.g., 16 weeks) this combination also helped with improvements in memory and cognitive alertness.
But of course, caffeine and L-Theanine are not the only compounds present in tea that may boost brain function — various catechins exert a positive influence, as well. Some preliminary evidence even suggests drinking tea can decrease the risk of dementia.
My advise
1...  I don't advise the couple when you wants to give birth to the healthy  child as this combination may be addicted which will give stimulation of nervous system to your unborn child.
2...  When you wants to drink this combination drink water and you should not consume more than 100 ml per day

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