Green and black teas offer similar health benefits
A review of studies on health benefits of green and black teas found that both are equally effective. Both varieties come from the same plant, camellia sinensis. The difference is how the leaves are processed: green tea leaves are steamed and dried, while black tea leaves are fully oxidized. According to the researcher, studies that have looked at those two types of tea have confirmed similar improvements in vascular function, leading to significant reductions in stroke risk. The average intake in those studies was 4 cups per day for black tea and 5 to 6 cups per day for green tea (due to the smaller cup traditionally used). The study was commissioned by the UK Tea Advisory Panel.