1.Nitrite Fish will produce nitrite in the curing process, and nitrite and fish protein decomposition products amine combined into nitrosamines, which is a very strong carcinogenic substances, a large amount or long-term intake of this substance will cause cancer. The human nasopharyngeal cancer, stomach cancer, esophageal cancer, liver cancer, etc. are related to this substance.
2.Mold Fish is a kind of meat with little connective tissue and loose, so bacteria can easily enter the muscle along the loose tissue. And its gills and guts can easily hide bacteria, which leads to fish is very easy to deteriorate and mold. Salted fish with red spots is a moldy phenomenon, this spot is also known as the red change.
Not only can moldy salted fish cause nasopharyngeal cancer, which is mainly caused by bacteria, but it may also cause gastroenteritis, food poisoning and other problems.
In addition, the high salt content in salted fish can lead to gastritis, stomach cancer, diabetes, bronchial asthma and upper respiratory tract infections.
3.Other diets leading to nasopharyngeal cancer The occurrence of nasopharyngeal cancer has certain geographical characteristics, such as folk will call nasopharyngeal cancer Guangdong tumor, in addition to the love of salted fish as a reason, food rich in nickel is also a reason.
According to a survey in Guangdong, the trace elements of nickel in rice and water in areas with high incidence of nasopharyngeal cancer are higher than those in other areas, and high nickel content is also found in the hair of nasopharyngeal cancer patients. It has been proved in animal experiments that nickel has a catalytic effect on the development of nasopharyngeal cancer induced by nitrosamines.
Besides, the occurrence of nasopharyngeal cancer is also related to heredity, race, viral infection, etc. It usually presents a family gathering phenomenon, such as father and son or siblings suffering from nasopharyngeal cancer together.