How Tea Works
Against The Common Cold Flu Viruses

Viruses are so small that you can fit more than three trillion on the surface of a penny.

Viruses are everywhere–scientists have counted over one billion in a teaspoon of seawater or natural water, or at least 10 million per drop of seawater (Parsons R et al, Ocean time-series reveals recurring seasonal patterns of virioplankton dynamics in the northwestern Sargasso Sea, The ISME Journal, August, 2011).

The good news is that relatively few viruses are harmful to humans.

Still, the few harmful viruses are hard to fight because of their size and because they keep changing. But they are not harmful until they get past the cell wall and are inside a living cell where they will replicate.



Cocktail of Human Disease Viruses

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Several groups of viruses cause influenza and around 200 viruses cause the common cold.

Tea protects cell walls from viruses

• Early laboratory cell studies have shown that EGCG, the primary antioxidant polyphenol from green tea and theaflavin, the primary antioxidant polyphenol from black tea prevent both influenza A and B viruses from adhering to cell walls, the first step to infection (Nakayama, 1993).

• Another study with green tea catechins including EGCG, or epigallocatechin gallate, showed that these unique catechins changed the viral membrane of both influenza A and B in ways that prevented the viruses from adhering to cell walls, as well as inhibiting hemagglutination (clumped red blood cells) and RNA synthesis in cells that were already infected (Song, 2005)

Both black and green tea act against cold flu viruses

• People were given a black tea gargle twice daily for five winter months. When tested for two influenza A viruses and ten influenza B viruses, the black tea gargle group showed a significant 25% reduction compared to controls (Iwata, 1997). A study using a green tea gargle showed 87% protection from flu.

• A study with green tea catechins found that EGCG was the most powerful inhibitor of the common cold adenovirus. EGCG worked in late stage virus infection by inhibiting protease (Weber, 2003). Green tea also inhibits protease in HIV infections.

• A study with mice applied influenza viruses to their nose. The control group became infected and all died within 10 days. The tea group had black tea mixed with the viruses applied to the nose.

• All mice receiving tea survived.

Protecting the immune system

One amazing result is that 90% of the mice receiving tea did not even form antibodies to the viruses. They were exposed to the virus, but not only did they survive, but for their immune system, it was as if the exposure had never happened.

The black tea used was at “cup of tea” strength (Nakayama, Inhibition of the infectivity of influenza virus by black tea extract, Kansenshogaku Zasshi, July 1994).

Lifestyle habits add up

Cold and flu viruses are spread through the air and by touch. Keep reasonable barriers and wash your hands frequently. Consider a flu vaccination if appropriate.

Another way to help defend yourself against cold flu viruses is to protect your immune system. Keep your immune system strong by eating healthy food rich in vitamins, minerals, and other nutrients, getting sufficient rest, exercising daily, stopping smoking, and managing stress.

And explore all the health benefits of green tea.

Green tea varieties: Dragon Well | Mao Feng | Matcha | Gunpowder Green | Pi Lo Chun | Gyokuro | Lu Shan Yun Wu | Japanese Sencha | Lu An Melon Seed | Jasmine | Blooming Tea | Chun Mee | All Flavored | Organically Grown | Premium Estates

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