Initial Posting: 1/23/2018    Last Update: 6/12/2019
Question: Can green tea help prevent the flu?
Answer: Preliminary research suggests that drinking green tea during flu season may reduce the risk of getting the flu. Gargling with green tea may also help — a practice that is common in Japan. The evidence for green tea supplements is less clear. More details are in the Flu section in the Green Tea Review (which includes tests and comparisons of brewable green teas, supplements, matcha, and bottled green tea).