Crab and shrimp can be eaten together in moderation, and the two foods do not produce harmful, toxic substances when eaten together, so as long as you are not allergic to seafood, you can eat them together. Crab and shrimp are both seafood, can be eaten at the same time in moderation. Crab and shrimp are rich in nutrients, the two foods with food, supplemental nutritional effect will be better, both have a certain nutritional value. But we need to pay attention to moderate consumption, to avoid excessive consumption caused by abdominal pain, diarrhea and other gastrointestinal discomfort. Seafood allergic people if you eat crab and shrimp at the same time, may cause such as itching, redness and other allergic reactions, therefore, seafood allergic people should be prohibited from eating. Crab and shrimp can be eaten together, but pay attention to nutritional balance, do not overdo it. At the same time, daily with other fresh vegetables, fruits, etc., meat and vegetables.