It always seemed to me that the only way to lose weight was to burn more calories than you consumed. Nothing else (other than disease or parasites) made sense, and even disease and parasites work the same way. More calories used than consumed overall.
So I have always been baffled by those who spend more on diet programmes when trying to lose weight. Considering the simple formula intake - expenditure = weight gain, surely if you're eating less, you save money? If you are trying to lose weight, you save more because your calories stored in body fat act like savings. No need to buy energy you're already carrying around.
In these days, of course, people like to sit in front of TV and watch drivel most of the time. How they can bear it I'll never know, but it seems popular. They think that by drinking some cement-based powder they'll magically lose weight. I always thought it was a con.
It's good to be proved right.