People with type AB blood combine the advantages of type A blood and type B blood, and have strong digestion ability for vegetarian meat. But this kind of person's digestive system is sensitive and easy to get fat. Basically, people with type A and B blood should not eat more, and people with type AB blood should not eat more. People with this blood type should have a diversified diet. If they are overweight, they should give priority to fruits and vegetables, supplemented by meat and dairy products to maintain a balanced nutrition. It should be noted that animal protein and type A blood are difficult to digest, which is not a big problem for people with type AB blood, but their immune system is relatively weak, so they should eat more fruits and vegetables rich in vitamin C.

People with type O blood need to work hard on exercise if they want to lose weight. Like hunters in primitive society, they often need a lot of high-intensity exercise to burn body fat and get enough exercise.