Ketogenic diet contains carbohydrate.
By 2007, the ketogenic diet was available from around 75 centres in 45 countries, and less restrictive variants, such as the modified Atkins diet, were in use, particularly among older children and adults
 Fat is energy-rich, with 9 kcal/g (38 kJ/g) compared to 4 kcal/g (17 kJ/g) for carbohydrate or protein, so portions on the ketogenic diet are smaller than normal

