Eel is a common food with rich nutrition, but eating more eels may have adverse effects on health. First, eels are rich in fat and cholesterol. Excessive intake may lead to excessive calorie intake, increase the burden on the gastrointestinal tract, and cause problems such as indigestion and bloating. In addition, the high fat content of eels also increases the risk of obesity. Secondly, eel belongs to high purine food. Excessive intake will lead to purine metabolism disorder in the body, lead to uric acid is too high's disease or hyperuricemia, and then induce gout attacks. In addition, eel contains more cholesterol than other fish, and excessive intake may increase the risk of hypercholesterolemia.