What healthy benefits are lost when tea is iced? Research has been conducted. Scientists at the University of Hong Kong proved that only 20% of the admirable antioxidants in tea dissipate when cooled from 98 Celsius. With warm weather on the arisen this is good news. Americans prefer iced tea to hot, perhaps due to the higher temperatures in North America. Additionally, lemon is normally added to their iced tea. Lemon in fact has shown to delay the reduction of antioxidants. However, do not add the sugar dosage commonly used by westerners; this is where the calories add up!