No question about it, drinking fresh-brewed green tea is a boost to health. Studies connect the beverage to a lower risk of stroke, depression, dementia, heart disease, several types of cancer, and even bone fracture. Trouble is, bottled and canned green teas contain fewer antioxidants than fresh brewed varieties. And it’s questionable whether a few B vitamins, tiny amounts of herbs, or stimulants like guarana offer much added benefit, particularly in teas packaged with lots of sugar and additives.The Bottom Line: The best option: Brew it yourself; allow tea to steep for three to five minutes to get the highest concentration of antioxidants. Second best: Honest Tea Classic Green Tea, 30 calories per 8 ounces or unsweetened, sugar-free canned varieties like Xing Tea Unsweetened.