Researchers have made an interesting discovery after examining a U.S. Department of Agriculture database on how much of each type of food Americans eat – Americans receive more antioxidants from coffee than from any other dietary source. While researchers are quick to state this does not mean coffee is necessarily the best source of antioxidants, it is a major source. For you tea drinkers, black tea was the second-leading source of antioxidants in the U.S. diet. Coffee drinkers still need to heed caution and ensure consumption is kept in moderation as excessive consumption has many negative effects.