The bioactive substances or phytochemicals found in Herbal Tea and beverages have been shown to be helpful in preventing metabolic diseases like diabetes, glucose intolerance, and obesity. In studies involving experimental animals, these plant compounds, such as polyphenols, have been linked to antioxidant, anti-inflammatory, anti-tumor, and anti-mutagenic effects; however, epidemiological studies in people have shown an adverse correlation between the risk of chronic disease and consumption of polyphenols.
Plant secondary metabolites known as polyphenols play a role in the body's defensive mechanisms against UV radiation and infections. Data from in vitro, in vivo, epidemiological, and human clinical studies have linked consumption of polyphenol-rich diet or beverages with positive health effects, such as protection against diabetes, ocular diseases like cataracts, cardiovascular diseases, neurodegenerative disorders, and the growth of cancers.
