What harm do preservatives do to the body?

Food preservatives can inhibit microbial activity and prevent food from spoiling, thereby extending the shelf life of food. Most beverages and packaged foods often need to add food preservatives if they want to be preserved for a long time. The harm of food preservatives to human health is as follows: So far, my country has only approved 32 types of food preservatives that are allowed to be used, and they are all low-toxic and safe varieties. They have undergone a large number of scientific experiments before being approved for use, including animal breeding and toxicity tests and identification. It has been confirmed that they will not cause any acute, subacute or chronic harm to the human body. As long as the variety, quantity and scope of food preservatives used by food manufacturers are strictly controlled within the scope of the national standard "Hygienic Standards for the Use of Food Additives" (GB2760-96), they will never cause harm to human health. People can eat it with confidence. For example, the foods we see on the market usually add preservatives such as potassium sorbate and sodium benzoate. These two most widely used preservatives are generally excreted in the urine after being ingested by the human body and will not be present in the human body. Accumulation in the body. Of course, food preservatives are also a "double-edged sword" and may also cause certain troubles to people's health. In our country, most of the preservatives currently used in food production are artificially synthesized, and improper use will have certain side effects; some preservatives even contain trace amounts of toxins, and long-term excessive intake will cause certain damage to human health. Take the currently widely used food preservative benzoic acid as an example. Its use has always been controversial internationally. For example, because there have been reports of accumulation poisoning of benzoic acid and its sodium salt, the European Child Protection Group believes that it should not be used in children's food, and Japan has also imposed strict restrictions on its use. Even sorbic acid and potassium sorbate, one of the internationally recognized safe preservatives, excessive intake will affect the balance of human metabolism.