It's probably already in your cupboard.

L-theanine is an amino acid found mainly in green and black tea. Research suggests that around 200 to 400 milligrams (mg) per day may help manage anxiety and stress, though more research is necessary.

L-theanine is a compound that may support thinking, sleep, and relaxation and help with weight loss, blood pressure, and more. Research suggests that L-theanine might provide a range of health ...

Jillian Kubala, MS, is a registered dietitian based in Westhampton, NY. Jillian uses a unique and personalized approach to help her clients achieve optimal wellness through nutrition and lifestyle ...

Women's Health may earn commission from the links on this page, but we only feature products we believe in. Why Trust Us? In a new interview with Elle magazine, Taylor Swift admitted to taking the ...

L-theanine may promote relaxation, focus and attention, and help relieve stress. Food sources of L-theanine include matcha, some mushrooms and green, black and white teas. L-theanine should not be ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Who wouldn't want to take a pill and quickly experience less stress and anxiety without unpleasant side ...

If you’ve ever sipped a caffeinated green tea and felt instantly relaxed, you’ve already experienced the cool, calm, collected benefits of L-theanine. The best L-theanine supplement can go beyond ...

Not all mood-boosting claims hold up–but some ingredients show promise.

L-theanine lattes are the new mushroom coffee—and, fortunately, a lot better tasting. In LA, you’ll find the amino acid on the menu at influencer hot spot Alfred Coffee in its Bolt Energy drink, ...

The amino acid L-theanine is an effective treatment of moderate and severe anxiety and does not cause drowsiness. Green tea is used as a restorative in traditional Chinese medicine and contains many ...

L-theanine is an amino acid that occurs naturally in tea leaves and is used in Asian medicine to treat many medical and mental health problems. In a previous blog post, I briefly reviewed the evidence ...