The tea business is mysterious. I suppose this is due to the exotic places that it comes from. There is no mystery about the health benefits of tea, however. 1. Antioxidant properties. This is true of both green and black tea. Over 4700 years ago, the ancient Chinese claimed tea was “useful for treating tumors, abscesses, bladder ailments, lethargy, among other conditions.” One of the compounds that has been isolated is the antioxidant epigallocatechin gallate EGCG.