Chai and coffee both contain caffeine and energy-boosting compounds. However, they can affect your energy levels in different ...

Tea contains 4 substances that have stimulating effects on your brain. The best known is caffeine, a potent stimulant that you can also get from coffee, soft drinks, and energy drinks. Tea also ...

Green tea is a good source of caffeine and L-theanine, containing both in moderate amounts. The combination of green tea and L-theanine creates a calm alertness that supports mental clarity while ...

Theanine, also known as L-theanine, is an amino acid. It is found in tea leaves, especially in green tea and loose-leaf teas. You can consume L-theanine by drinking matcha, green tea, or white tea. It ...

These popular beverages often have many other ingredients, like vitamins and plant extracts. Here’s what you should know about them.

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 ...

Taking l-theanine daily for a short period is generally safe, although not enough research has been done on its long-term use.

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 ...

L-theanine is an amino acid. While more research is necessary, possible benefits include managing anxiety, relieving stress, and reducing insomnia. L-theanine is primarily found in green and black tea ...