Last updated: April 3, 2026 Quick Answer Polyphenols are a large family of naturally occurring plant compounds found in fruits, vegetables, tea, coffee, whole grains, and spices. They act primarily as antioxidants and anti-inflammatory agents in the body, and a growing body of research links regular dietary polyphenol intake to reduced risk of heart disease, … Continue reading What Are Polyphenols? Benefits, Food Sources and What the Evidence Shows