I've heard good matcha can actually improve my immune system. Really?

A recent study in the journal Proceedings of the National Academy of Sciences concluded that drinking matcha everyday greatly enhanced the overall response of the immune system. The exceedingly high levels of antioxidants in matcha mainly take the form of polyphenols, catechins, and flavonoids, each of which aids the body's defense in its daily struggles against free radicals that come from the pollution in your air, water and foods. On a practical level this can mean fewer colds and better protection against viruses.