Oh, and fatty lard-buckets getting off their portly posteriors and doing some exercise.
Unfortunately, exercise is a poor means of losing weight, due to the remarkably high energy density of a fat and sugar laden diet. The key to weight loss is simply eating a lot less of carbs, fats, sugars and booze.
Now where are bloody scientists when you want something useful doing? They need to do one of three things:
1. Make chips, sausage and bacon have the nutritional value of lettuce
2. Make lettuce taste like chips, sausage or bacon
3. Make me believe that I enjoy lettuce more than sausage chips or bacon.
Any one will do.