1. Fish: such as tuna, salmon, saury, cod, etc. Among them, salmon and saury are particularly high.
2. Shellfish: such as oysters, scallops and clams.
3, kelp: such as Undaria pinnatifida, seaweed and so on.
4. Seafood such as shrimp, crab and lobster.
5. Livestock and poultry meat: such as pork, chicken and beef. Among them, pig's head, pig's liver, pig's heart, chicken's liver and other animals have high internal organs.