The findings come 36 a study of nearly 1,000 US people that looked at diet, calorie intake

The findings e     36     a study of nearly 1,000 US people that looked at diet, calorie intake and body mass index (BMI) - a measure of obesity.    37     is found that those who ate chocolate a few times a week were, on     38    , slimmer than those     39     ate it occasionally. Even though chocolate is loaded with calories, it contains ingredients（材料）that may favour weight loss     40     than fat synthesis, scientists believe.    41     boosting calorie intake, regular chocolate consumption was related to lower BMI in the study,     42     is published in Archives of Internal Medicine. The link remained even when other factors, like how     43     exercise individuals did, were taken into     44    .And it appears it is how often you eat chocolate that is important, rather than how much of it you eat. The     45     found no link with quantity consumed.
    46     to the researchers, there is only one chance in a hundred that their findings could be explained by chance alone. 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 position of calories, not just the number of them, matters for determining their ultimate impact on weight.This is not the first time scientists     47     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（胰岛素）sensitivity and cholesterol（胆固醇）level. And chocolate,     48     dark chocolate, does contain antioxidants（抗氧化剂）which can help to mop up harmful free radicals - unstable chemicals that can damage our cells.
Dr Golomb and her team believe that antioxidant pounds, called catechins（儿茶素）, can improve lean muscle mass and reduce weight      49     studies in rodents would suggest this might be so. Mice     50     for 15 days with epicatechin (present in dark chocolate) had improved exercise performance and observable changes to their muscle position.They say clinical trials are now needed in humans to see     51     this is the case.
But before you reach     52     a chocolate bar, there are still lots of unanswered questions. And in the absence of conclusive evidence, experts advise caution.While there's no harm in allowing yourself a treat like     53     now and again, eating too much might be harmful because it often     54     a lot of sugar and fat too.And if you are looking to change your diet, you are     55     to benefit most from eating more fresh fruits and vegetables.
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