Physiology of a  Ketogenic Diet
Ketogenic diets, often called low-carbohydrate (low carb is slang), seem to be the latest diet trend.  There are many different forms, all varying in different degrees.  Ketogenic diets focus primarily on the limited intake of carbohydrates in the food pyramid.  In order to clearly understand ketogenic diets, one must start with the basics-what are ketones and where are ketones found and produced???
The ketogenic diet  is a high-fat, adequate-protein, low-carbohydrate diet . The diet forces the body to burn fats rather than carbohydrates.
Normally, the carbohydrates contained in food are converted into glucose, which is then transported around the body and is particularly important in fuelling brain-function. However, if there is very little carbohydrate in the diet, the liver converts fat into fatty acids and ketone bodies. The ketone bodies pass into the brain and replace glucose as an energy source. An elevated level of ketone bodies in the blood, a state known as ketosis
Most dietary fat is made of molecules called long-chain triglycerides (LCTs). However, medium-chain triglycerides (MCTs)—made from fatty acids with shorter carbon chainsthan LCTs—are more ketogenic. A variant of the classic diet known as the MCT ketogenic diet uses a form of coconut oil, which is rich in MCTs, to provide around half the calories. As less overall fat is needed in this variant of the diet, a greater proportion of carbohydrate and protein can be consumed, allowing a greater variety of food choices