One Size Fits All?

Or does it?

That's the real trick to these diets, isn't it? Try >MY< diet plan in the next ten minutes, and you'll loose weight in the next five minutes...

Okay so I am exaggerating, not all the fad diets out there are like that, but if you really think about it there are a lot of diets out there that make assumptions about how your body is going to respond to the foods you eat. There are of course some inevitable truths out there (sorry, there is no krispy