Weight loss can be helped by quitting smoking, scientists have found at Yale University.
While one day thought that smoking can help dieters stay weak by reducing their appetite, smokers actually have much worse diets than former or non-smokers.
Those who smoke eat more than 200 calories a day.
It seems that while they eat less, smokers choose more calories-rich foods.
Those who smoke every day eat about 2.02 calories per gram of food they consume.
On the other hand, those who smoke, but not every day, eat about 1.89 calories per gram.
People who never smoked consume 1.79 calories per gram of food.
Scientists believe that those who smoke would choose a low-calorie diet who did not.
Smokers eat fewer fruits and vegetables, putting them at increased risk of cardiovascular disease and cancer.
"We know from literature that weight gain concerns are barriers to quitting, and we know that high energy density diets are associated with increased body weight," said a research scientist.
"Our findings suggest that eating energy density in existing smokers' diets may be a good target for interventions as part of a larger smoking cessation plan."
So if you are looking to quit smoking and improve your health for good, be sure to eat a full diet of healthy carbohydrates such as fruits, vegetables and brown rice.
The study looked at 5293 adults who took the National Health and Examination Examination.
The NHS provides a lot of help with quitting smoking, including how to stop weight loss.
"After you quit smoking, your body burns more slowly, even if you do not eat more than smoking, you can gain weight - but being more active can help you.
"Regular exercise may prevent about half of the expected increase in weight a year after quitting, it burns calories and reduces cigarette cravings."
Restricting your calories on just two days of the week has a quicker weight loss effect than cutting calories every day. Those following the diet plan were able to reach at least five per cent weight loss within two months, found the researchers.