see digestive systemdigestive system, in the animal kingdom, a group of organs functioning in digestion and assimilation of food and elimination of wastes. Virtually all animals have a digestive system. In the vertebrates (phylum Chordata, subphylum Vertebrata) the digestive system is very complex.
For information on ketogenic diets as a lifestyle choice or for weight loss, see Low-carbohydrate diet and No-carbohydrate diet. The ketogenic diet is a high-fat, adequate-protein, low-carbohydrate diet that in medicine is used primarily to treat difficult-to-control (refractory) epilepsy in children. The diet forces the body to burn fats rather than carbohydrates.
Before we dive in, however, it is important to understand that there are three types of ketogenic diets: the Standard Ketogenic Diet, the Cyclical Ketogenic Diet, and the Targeted Ketogenic Diet. All are very closely related but differ in regards to limits and timing of carbohydrate consumption.