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L-theanine supplements could interact with some anti-anxiety, blood-pressure, and sleep meds. Side effects include headaches, dizziness, nausea, and jitteriness. Do I Really Need to Take L-theanine?
The name theanine usually refers to the enantiomer L-theanine, which is the form found in tea leaves from which it is extracted as a powder. [4] [6] The right-handed enantiomer, D-theanine, is less-studied. Theanine is sold as a dietary supplement and is considered to be safe at doses up to 250 milligrams (mg) by the US Food and Drug ...
L-theanine also has the potential to sharpen your attention span and other cognitive capabilities, so taking it in the morning or during the day might work better for you if these are the effects ...
L-theanine. An amino acid in tea leaves, L-theanine reduces anxiety and promotes relaxation without sedation. Keep in mind that each of these has pros and cons, and more research is needed to ...
Common effects, which vary depending on the substance and dosage in question, may include enhanced alertness, awareness, wakefulness, endurance, productivity, and motivation, increased arousal, locomotion, heart rate, and blood pressure, and the perception of a diminished requirement for food and sleep.
In a systematic review of small, preliminary studies where the effects of modafinil were examined, when simple psychometric assessments were considered, modafinil intake enhanced executive function. [27] Modafinil does not improve mood or motivation in sleep-deprived or non-sleep deprived individuals. [28]
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