On
a ketogenic diet, people eat a very small
amount of carbohydrates, a moderate amount of protein and a large proportion of
fat per day. This means that the body uses fat as its main source of fuel and
breaks it down into ‘ketone bodies’ (or ‘ketones’) in a process called ketosis.
People on a keto diet usually eat only 20–50g of carbs per day. As an example,
50g of carbohydrate is equivalent to 2 slices of bread and a banana. Carbs make
up about one tenth of daily kilojoule intake in a ketogenic diet (a kilojoule
is a measure of how much energy we get from food). This means the person’s body
stays in a constant state of ketosis. Evidence shows that the diet may be
suitable for some people with certain medical conditions but should not be used
for the general population, or as a long-term diet.
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