According to Cabrera, green tea contains gallic acid, a powerful antioxidant in its own right. It also contains carotenoids, tocopherols, ascorbic acid (vitamin C) and minerals such as chromium, manganese, selenium, zinc and certain phytochemical compounds.
1. forceful, strong. Powerful, mighty, potent suggest great force or strength. Powerful suggests capability of exerting great force or overcoming strong resistance: a powerful machine like a bulldozer. Mighty, now chiefly rhetorical, implies uncommon or overwhelming strength of power: a mighty army.
We highly recommend Keith Woods' essay, An Essay on a Wickedly Powerful Word, from the online archives of the Poynter Institute for Media Studies, on the uses of this particular racial epithet in journalistic situations. Among other things, the essay is instructive in the power of language.