Blue tongue lizards are omnivorous and eat a mix of vegetables, fruits, insects, snails, and sometimes meat. Their diet in the wild typically includes insects, snails, slugs, wildflowers, native fruits, and berries. In captivity, they are usually fed a variety of food items including leafy greens (like mustard greens, kale, dandelion), vegetables (carrot, squash, corn), fruits (apple, banana, strawberries), and protein sources such as crickets, mealworms, earthworms, cooked eggs, and occasionally pinkie mice or small insects. They need a balanced diet with both plant and animal matter to stay healthy, with juveniles requiring more protein and adults eating more vegetables. Supplements such as calcium and multivitamins are often added to their diet to ensure proper nutrition.