People who eat chocolate regularly tend to be thinner, new research suggests.
The findings come from a study of nearly 1,000 US people that looked at diet, calorie intake and body mass index (BMI) - a measure of obesity.
It found those who ate chocolate a few times a week were, on average, slimmer than those who ate it occasionally.
Even though chocolate is loaded with calories, it contains ingredients that may favour weight loss rather than fat synthesis, scientists believe.
Despite boosting calorie intake, regular chocolate consumption was related to lower BMI in the study, which is published in Archives of Internal Medicine.
The link remained even when other factors, like how much exercise individuals did, were taken into account.
And it appears it is how often you eat chocolate that is important, rather than how much of it you eat. The study found no link with quantity consumed.
According to the researchers, there is only one chance in a hundred that their findings could be explained by chance alone.
But the findings only suggest a link - not proof that one factor causes the other.
Lead author Dr Beatrice Golomb, from the University of California at San Diego, said: "Our findings appear to add to a body of information suggesting that the composition of calories, not just the number of them, matters for determining their ultimate impact on weight."
This is not the first time scientists have suggested that chocolate may be healthy for us.
Other studies have claimed chocolate may be good for the heart.
Consumption of certain types of chocolate has been linked to some favourable changes in blood pressure, insulin sensitivity and cholesterol level.
And chocolate, particularly dark chocolate, does contain antioxidants which can help to mop up harmful free radicals - unstable chemicals that can damage our cells.
Dr Golomb and her team believe that antioxidant compounds, called catechins, can improve lean muscle mass and reduce weight - at least studies in rodents would suggest this might be so.
