What does taking L-theanine with caffeine do?
Research has shown that this combination can improve attention, reaction time, and cognitive performance more effectively than either substance alone. Einöther & Martens, 2013 reported that 100 mg of caffeine paired with 200 mg of L-theanine improved both speed and accuracy in cognitive tasks. Research shows magnesium may reduce anxiety, stress, and sleep, while L-theanine may aid relaxation but could also increase focus for some people. Addressing overall sleep habits is crucial, as supplements alone may not resolve sleep issues.You may take L-theanine at any time of day. Taking L-theanine in the morning can support a healthy stress response. You might take it at night before bedtime to promote restful sleep.Studies show L-theanine works well for reducing immediate reactions to stress. In one crossover study, 200 mg of theanine was found to significantly blunt cortisol levels after a mental stress challenge. But L-theanine appears less effective for chronically elevated cortisol levels.The study showed that this combination could potentially increase sleep duration and REM sleep. According to Zumpano, if you’re looking to try L-theanine in tea or supplement form, it’s a good idea to take it in the evening before going to bed and not pair it with any coffee or caffeinated beverage.
Is L-theanine with caffeine good for ADHD?
For example, one study found that L-theanine with caffeine lowered impulsivity in children with ADHD. Another indicated that test groups who received L-theanine alone or L-theanine plus caffeine both showed significant improvement in ADHD symptoms versus placebo. L-theanine is an amino acid known for its calming effects. It’s primarily found in green tea, matcha, and white tea. L-theanine may offer a wide variety of positive health benefits such as improved mental focus and sleep quality. When taken with caffeine, L-theanine might boost alertness and concentration.A2: No, L-theanine does not typically cause drowsiness or act as a sedative. Its primary effect is to increase alpha brain waves, which are associated with a state of calm alertness or wakeful relaxation, similar to the state of mind achieved during meditation (Dashwood & Visioli, 2025).Pairing caffeine and L-theanine can boost attention and mental clarity while reducing the jittery edge often caused by coffee alone. The combo is safe for most healthy adults in moderation.L-theanine with Caffeine This combination is one of the most studied natural alternatives to Adderall for focus enhancement. L-theanine, an amino acid in green tea, works with caffeine to increase alertness without the crash or jitteriness associated with caffeine in isolation.L-theanine is an amino acid naturally found in tea leaves, especially in green tea that has long been prized for its versatile weight loss support. Green tea supplies antioxidants called catechins, which boost metabolism and help burn fat more efficiently.