The most iodine-containing fruits are persimmons and pears, as well as apples, bananas, etc. Vegetables such as cabbage, spinach and celery have higher iodine content.

Animals contain more iodine than plants; seafood has higher iodine content than land products. The foods with the highest iodine content are seafood, such as kelp, seaweed, fresh hairtail, dried clams, dried clams, scallops, mussels, sea cucumbers, jellyfish, lobster, etc.; kelp has the highest iodine content.

On land, eggs and milk have the highest iodine content (40 μg/kg to 90 μg/kg), followed by meat. Freshwater fish has lower iodine content than meat, and plants have the highest iodine content. The quantity is the lowest.