The satiation thing is a valid point (as others have pointed out). I just don't like the super high level view he took of it. I'd prefer something more controll

The satiation thing is a valid point (as others have pointed out). I just don't like the super high level view he took of it. I'd prefer something more controlled like eating calorically equal foods and then ranking them by how long they satisfied his hunger. Fasting is a very effective tool for losing weight. By itself it doesn't really cause any magic (meaning, it doesn't increase the rate of fat loss on its own or anything like that). It's a great tool for diet adherence because your body eventually gets used to its eating hours. If you only eat in an 8 hour window each day, you're fuller during that 8 hour window and generally less hungry in the 16 hour foodless window. You can read more here - http://www.leangains.com/2010/10/top-ten-fasting-myths-debunked.html http://www.leangains.com/2010/10/top-ten-fasting-myths-debun.... The whole site is dedicating to intermittent fasting and is a good resource.