Quercetin What Is Quercetin? Quercetin is a naturally occurring flavonoid antioxidant found in many vibrant, plant-based foods. Often referred to as a “plant pigment,” it’s responsible for the rich colors in fruits and vegetables—and the powerful health benefits that come with them. Common Food Sources: 🥬 Leafy greens 🍅 Tomatoes 🫐 Berries 🥦 Broccoli Because it’s one of the most abundant antioxidants in the human diet, quercetin plays a key role in protecting the body from