Drink Tea for a Stronger Immune System We have seen that drinking tea appears to offer a strong boost to the immune system. In a study extending the results,¹ blood samples were taken on 5 participants before and after one week of drinking about five cups of tea a day (the participants did not drink tea before the study started). The before and after blood samples were exposed to e.coli bacteria, and production of interferon gamma, a molecule that fights bacteria, viruses, and tumors, was measured. Mean production went from 155 pg/mL before tea drinking to 448 pg/mL after tea drinking. The mean difference for the 5 subjects is 293 pg/mL with a standard deviation in the differences of 242. The paper implies that the use of the t-distribution is appropriate. ¹Adapted from Kamath, A., et. al., "Antigens in tea-beverage prime human Vy2V02 T cells in vitro and in vivo for memory and non- memory antibacterial cytokine responses," Proceedings of the National Academy of Sciences, May 13, 2003; 100(10): 6009-6014.

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