The general public can't look at this problem like this. Because modern medicine has made it clear that eating more salt will lead to an increase in the incidence of hypertension, and many people in China suffer from hypertension because of eating more salt, that is, "salt-sensitive hypertension". People in the city can't eat, so they have to drink and eat something cold. We rural people used to cook soup with pickles when there was no refrigerator at home. The so-called pickled cabbage is washed with green vegetables, dried in the sun, and then pickled with soy sauce and warm water.
Rural people often eat pickles as long as they don't overdo it. Salted lai contains a lot of nitrite. Nitrite is not a carcinogen. Only when amine forms nitrosamines can it cause cancer. Nitrite does not necessarily form carcinogens when it meets amines. This requires certain conditions. At this time, only pickles cooked at home are the best meals. Every time my mother takes out a few sauerkraut from the old jar, then washes it, cuts it into pieces, and fries it with green pepper, garlic and ginger, which becomes delicious for next meal.
The human body is a chemical plant. A certain amount of harmful substances may not have harmful effects on human body through metabolism, transformation and rejection after being ingested. However, if the short-term excessive intake of harmful substances exceeds the decomposition and transformation capacity of "chemical plants", human health will be damaged. You said that rural people eat salty food every meal, which is your misunderstanding. You can only say that salty food is the same for people in the city, but there will be salty food for three meals from morning till night, but the amount is very small.