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.
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 ...
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 ...
22, 2024 (GLOBE NEWSWIRE) -- The "Black Tea Extracts - Global Strategic Business ... The extract's high polyphenol content, known for its antioxidant properties, makes it a popular addition ...