This product belongs to the "Sera Nature" product range and does not require any dyes and preservatives. The colors of the different food types are due to the natural ingredients. A varied diet with ingredients close to nature is the best protection against deficiencies, and supports health and liveliness of the reptiles. The Nature food types therefore contain natural ingredients such as spirulina, gammarus or gently dried herbs and blossoms. The signets on the package front side indicate these ingredients and their amounts in the food.