Reptile nutrition is highly specialized, based on whether the animal is an insectivore (e.g., geckos), carnivore (e.g., snakes), herbivore (e.g., tortoises), or omnivore (e.g., bearded dragons). Providing a balanced diet involves matching food to the species' natural habits, proper gut-loading of insects, and using essential supplements like calcium and vitamins to prevent metabolic diseases.