Guayusa is rich in a group of polyphenol antioxidants known as catechins which could help fight toxins in the body.Toxins easily combine with damaged cells causing a series of problems. Toxins cause oxidative stress, which is the human body's form of rust. As we get older, oxidative stress increases & we need antioxidants more. These antioxidants may help to remove these toxins from the body.