Scientists at the Rowett Research Institute in Aberdeen have found that tea brewed in a pot releases more cancer-fighting antioxidants than quick infusions. The study found that blood antioxidant levels were 60% higher among participants who drank black tea brewed for five minutes, compared with those who opted for a one-minute infusion. Scientists also found that the concentration of antioxidants, which combat free radicals linked to cancer and heart disease, dont increase beyond the five minute threshold.