The Incredible Immune-Modulating Effects of Green Tea Catechins

Green tea is a healthy and delicious beverage that helps support metabolic function and weight management. Did you know that green tea may also help boost your immune system

Green tea contains naturally occurring compounds called polyphenols. Polyphenols are micronutrients contained in some plant-based foods. These natural, bioavailable chemicals include epigallocatechin gallate (EGCG), a highly beneficial compound. Studies are underway to assess the positive impact of green tea extract on overall health and wellness. 

The results of these studies are significant. One of the best compounds in green tea is epigallocatechin gallate (EGCG)1. EGCG is capable of binding to cell membranes and changing the metabolism of bacteria, which can disrupt and weaken them.  

A 2005 study at a Japanese nursing home studied the impact of green tea catechins on a flu virus. The study found that the group who gargled with a tea catechin extract solution were significantly2 less likely to become infected with the flu. 

EGCG can affect and boost the immune and adaptive immune systems. One study found that EGCG could increase regulatory T cell presence3. These cells play a key role in immune function.  

In addition to the immune system boost, green tea catechins are natural antioxidants that help to prevent damage to cells. These compounds can reduce free radical formation and promote health and well-being. To get a concentrated and standardized source of EGCG, consider adding a green tea extract supplement to your nutritional regimen.  


  1. "Product Information: (-)-Epigallocatechin Gallate" (PDF). Cayman Chemical. 4 September 2014.
  2. Hiroshi Yamada, Norikata Takuma, Takashi Daimon, and Yukihiko Hara.The Journal of Alternative and Complementary Medicine.Sep 2006.669-672.
  3. Wong, Carmen P., et al. “Induction of Regulatory T Cells by Green Tea Polyphenol EGCG.” Immunology Letters, vol. 139, no. 1-2, 2011, pp. 7–13., doi:10.1016/j.imlet.2011.04.009.