Curds are harmful if you eat them often. First of all, curd contains more salt, which can cause a rise in blood pressure, and secondly, curd contains some nitrite, which is irritating to the stomach.

Nitrite, a class of inorganic compounds. Mainly refers to sodium nitrite, sodium nitrite is white to yellowish powder or granular, slightly salty taste, soluble in water. Nitrates and nitrites are widely found in the human environment and are the most common nitrogenous compounds in nature. Nitrate in the human body can be reduced to nitrite under the action of microorganisms, N-nitroso compounds of precursor substances. Appearance and taste are similar to table salt, and are widely used in industry and construction, and are allowed to be used as a coloring agent in meat products in limited quantities. Nitrite has a high incidence of food poisoning. Ingestion of 0.3 to 0.5 grams of nitrite can cause poisoning, and 3 grams lead to death.On October 27, 2017, the World Health Organization's International Agency for Research on Cancer published a preliminary collation of the list of carcinogens in reference to the conditions leading to endogenous nitrosation conditions of ingestion of nitrates or nitrites in the list of carcinogens in category 2A.

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