You don't have to look far to find articles about the health benefits of tea. Green tea has powerful antioxidants. Catechin is a tannin, specifically found in green tea. The fermentation process of black tea reduces the potency of catechin, a water-soluble polyphenol and antioxidant. One cup of green tea provides 10-40 mg of polyphenols, with more antioxidants than a serving of brocolli or spinach...(which may be a way to sneak the benefits of veges into the diet of a young person or finicky adult). Hot or iced, green tea can have broadbased health benefits.