Do the differnt blood types need special food to loose weight?

No; use same diets: Helpful weight loss diets include natural foods that take time to chew but contain few calories. Examples include carrots, celery, and iceberg lettuce (without salad dressing). When shopping for fruits, buy small ones no bigger than a tennis ball, because fruits contain natural sugar. Drinks without calories include water and green tea. A calorie is a calorie, regardless of where it comes from.

Unlikely: Weight loss is proportional to caloric restriction and not likely to be related to blood type.