Have any of you moms heard of this "baby food diet?"?

ok so a friend of mine is absolutely obsessed (like an unhealthy obsession) with losing her baby wieght. her son is starting to eat the baby food puree's (the fruit and stuff) and she eats it too!! for lunch she will eat a stage 2 gerber baby food tub! she said its nutritionally complete and it will help her lose weight... but, it doesnt seem like its made for an adults nutritional needs.. is she way off or is she right?