I'm A+, and According to the blood type book I'm supposed to eat a low protein vegetarian diet (IIRC). Well, I gained a lot of weight doing just that for 7 or 8 years. Went LC and my nagging health problems vanished, and the weight started falling off. Now that I'm down about 35 lbs I have to work at it a bit more, but it's still coming off and I feel better than ever with more energy than I had during my entire "type A diet" period put together.