Many use l-theanine to improve stress disorders, mood and sleep hygiene. Yes. While black tea has less caffeine than coffee, ...

Black tea contains caffeine and an amino acid called L-theanine, which may help improve alertness and focus. L-theanine increases alpha activity in the brain, resulting in relaxation and better focus.

Black tea is typically fermented (breaking down ... but the amount of caffeine varies by type. “The caffeine content in green tea may vary depending on the type of tea,” says registered ...

Green tea's polyphenol content may also be responsible for its anti-cancer properties." Despite being slightly higher in calories and much higher in caffeine, black tea still offers a host of ...

A recent study from The University of Western Australia suggests that drinking black tea could play a significant role in ...

The good news is that even tea with caffeine can count toward your hydration totals, although certain considerations apply (1 Trusted Source Black tea ... low caffeine content or are ...