19. Bottled Green Tea

Bottled green tea is often seen as a healthy, antioxidant-rich drink, but many varieties are loaded with sugar or high-fructose corn syrup. These sweeteners can erase the health benefits typically associated with green tea, turning a good choice into an unhealthy one. For true benefits, brew unsweetened green tea at home. Harvard T.H. Chan School of Public Health recommends homemade green tea for maximum nutrition.