Green tea is less oxidized, has a mildly earthy-grassy flavor, and usually contains less caffeine; while black tea is more oxidized, has a deeper, tannic flavor, and usually contains slightly more ...
The antioxidants in black tea may counteract the negative effects ... For most people, consuming up to 400 micrograms of caffeine per day is not associated with adverse health effects.
However guidance has been issued over food supplements containing caffeine, sometimes from multiple ingredients such as kola nuts, guarana and certain tea leaves such as black tea. Caffeine is ...
Those involved did not have cardiometabolic diseases at the outset.The information included the participants' self-reported caffeine consumption through coffee or black or green tea and the ...