September 1, 2012
Laboratory research shows promising outcomes for prevention of influenza with green tea catechins. Catechin binds to the virus preventing adsorption to host cells, thus preventing influenza. Theanine enhances systemic immunity. A small clinical trial showed gargling with green tea catechin extracts prevented flu infection in elderly nursing home patients.
Clinical Implications: Green tea consumption or green tea extract supplements might provide some protection from influenza.