All diets containing more energy than a person needs can cause weight gain. Fat provides just over twice as much energy per gram (37kJ/g) as carbohydrate (16kJ/g).
After a person discovers they are overweight or obese their lifestyle will need to change to reduce weight.
Many factors lead to a person becoming overweight or obese.
Doctors or dietitians can provide information on lifestyle changes that can lead to weight loss. This can be a good opportunity to make general improvements to their diet and physical activity levels.
Childhood obesity
Children who are very obese are not put on specific slimming diets.