Diet versus exercise, what contributes more to pure weight loss?

Iirc, Scooby once said that you can pretty much lose all the weight you want based on diet alone.

@Khaini: I've never heard about blood types affecting nutritional requirements. I thought it was solely based on cutting down depending on your daily caloric intake and daily caloric requirement. I've only ever heard of blood type affecting transfusions, not weight loss...

[URL="http://www.dadamo.com/"]http://www.dadamo.com/

[/URL] Blood type helps figure out what your body would benefit more from. It's not a diet specifically for weight loss but overall health. The calorie thing isn't working for him so it might help a little. But when it gets down to it, it's how much you eat then how much you burn, then how much you eat again to regenerate the muscle.