Polyphenols are a class of plant-based compounds found in fruits, vegetables, nuts, seeds, and beverages such as tea and wine. These compounds have been studied for their potential health benefits, particularly their antioxidant properties which can help protect cells from damage caused by free radicals. Polyphenols have also been shown to have anti-inflammatory, anti-cancer, and anti-aging properties, and may help to reduce the risk of chronic diseases such as heart disease, diabetes, and some types of cancer. Research in this area focuses on understanding the mechanisms of action of polyphenols, their effects on human health, and potential therapeutic applications.