Flavonoids are in everything from flowers to fruits and vegetables. They are brightly colored, and they protect the plant from bright sunlight and other dangers. Their bright colors also attract pollinators. The flavonoid, Cannflavin A, is only found in cannabis. This flavonoid has anti-inflammatory effects without side effects like ulcers, strokes, and heart attacks. These side effects are one of the currently administered drugs for pain. Flavonoids contribute to the entourage effect like terpenes and cannabinoids. Like the name suggests, flavonoids also are responsible for the flavor of cannabis.