This is the metabolic state that is achieved when your body gets most of it’s energy from fat instead of glucose. Your liver produces ketones from fat, either from your own body fat stores or from dietary fat. When this occurs you are said to be fat adapted. This can only be effectively achieved when your daily diet consistently contains less than 50 grams of carbohydrate although this will vary between individuals. Blood ketones can be measured by urine testing or more accurately by finger prick. A nutritional ketogenic state is defined by a level of blood ketones of between 0.5 to 3 mmol/L. This is not to be confused with diabetic keto-acidosis when ketone levels are much higher and is associated with a potentially serous medical condition.