When eating raw seafood, it should be frozen first and then sprinkled with some light saltwater. Oysters and some other shellfish often contain a type of bacteria called "injury-causing vibrio." For people with poor intestinal immune function, eating raw seafood can pose a potentially fatal danger. American researchers have found that placing oysters on ice and then pouring on some light saltwater can effectively kill this bacterium, making it safer to eat raw.
It is not advisable to drink beer when eating seafood. Consuming large amounts of beer with seafood can produce excessive uric acid, which can form uric acid crystals in the joints, worsening the symptoms of arthritis.
Seafood should not be eaten with certain fruits. Fish and shrimp are rich in nutrients such as protein and calcium. If eaten with fruits that contain a lot of tannic acid, the nutritional value of the protein will be reduced. Moreover, the calcium in the seafood can easily combine with the tannic acid to form a new substance that is difficult to digest. Fruits with high tannic acid content include persimmons, grapes, pomegranates, hawthorn, and green olives.
Shrimp should not be eaten with vitamin C. Scientists have found that consuming large amounts of vitamin C at the same time as eating shrimp and other aquatic crustaceans can be fatal, because a type of arsenic that is normally considered harmless to the human body can be converted into toxic arsenic in the presence of vitamin C.