Cancer patients should not eat crabs and scaleless fish.

Crab, scaleless fish (eel, catfish, mackerel, mackerel)

Duan, a famous anti-cancer doctor, thought that cancer patients should not eat this kind of food, and so did his ancestors. Crabs and scaleless fish are creatures that like to live in the bottom of the water and sediment, and they are cold and cool, while cancer patients are mostly spleen and stomach deficiency or cold and dampness, which is harmful to patients' health after eating. In addition, Chinese medicine has always believed that this kind of food is hair, which is easy to cause recurrence of old diseases. From the clinical observation, it is indeed possible to see the patient's condition get worse or relapse after eating the above food. From the perspective of modern medicine, we think this is probably related to the following factors:

Crabs and scaleless fish are different from ordinary fish, they will die quickly without water, and they are also different from amphibians such as frogs, turtles and turtles, and they can survive for a long time without water. Although crabs and scaleless fish can survive for a period of time after being caught, after leaving the suitable environment, the bacteria with strong vitality will gradually take the opportunity to grow and reproduce, and the protein in the fish will begin to disintegrate, while the bacteria with strong decarboxylase will take the opportunity to grow and reproduce, and the rich histidine in the fish will be decarboxylated to produce toxic histamine substances. Once they die, protein will decompose faster (much faster than fish that die immediately after being caught) and produce more toxic substances. After eating these foods, people will have symptoms such as dizziness, headache, palpitation and tightness, and in severe cases, symptoms such as shortness of breath, rapid heartbeat and decreased blood pressure will occur.

People who are allergic to fish and crabs will also have allergic reactions such as asthma, vomiting and diarrhea, abdominal pain, numbness of mouth and limbs and rash after eating. If the crab is not fully cooked, it will be infected with Vibrio parahaemolyticus after entering the human body, showing abdominal pain and diarrhea, nausea and vomiting, fever, and even dehydration, water and electrolyte disorder, systemic spasm, blood pressure drop and other serious consequences. Crabs often carry metacercariae of paragonimiasis, which can parasitize human lungs and cause lung injury. Cancer patients are already very weak. If you eat easily poisoned crabs and scaleless fish, it will aggravate food poisoning, reduce the resistance of patients, and lead to tumor recurrence and even death. However, there is no reliable evidence whether these substances themselves have carcinogens or substances that aggravate the disease. In order to be prudent, tumor patients should avoid eating crabs and scaleless fish. Scophthalmus maximus is a rare low-temperature economic fish, which was introduced to China from Europe in 1992. At present, the culture area of turbot in China has exceeded 5 million square meters, with an annual output of about 40,000 tons. Scophthalmus maximus has poor disease resistance and high requirements for culture technology. With the rapid development of turbot aquaculture, many farmers may use a large number of illegal drugs to maintain their output without passing technical barriers.