Is the cyclamate in corn safe?
People often see hawkers selling steaming corn sticks on their way to work. Corn is rich in dietary fiber, and today, more and more corn cereals are loved by people. However, the media recently revealed that some fried and puffed food "coffee corn" was suspected of illegally adding cyclamate. If you take long-term or excessive consumption of cyclamate, it will cause damage to the human body. Can corn sticks still be eaten?
Some sweet corns are rich in polysaccharides
Different varieties of corn have different tastes. Corn kernels can be divided into seed coat, endosperm and embryo. The key factor that affects corn sweetness is in corn endosperm. During maturation, corn produces glucose through photosynthesis and transports it to the endosperm, where it is stored in starch form. Although chemically speaking starch is a polymer of sugar, it does not taste sweet in itself. The common corn we eat is not sweet and "powdered". This is the reason. The difference of sweet corn is that its endosperm contains not only starch but also a relatively high content of water-soluble polysaccharides, which gives it a sweet taste different from ordinary corn. The reason is that one or a few genes in a series of genes controlling starch synthesis in sweet corn have undergone natural mutations and are in a homozygous recessive state, cutting off the process of conversion of some reducing sugars to starch, making corn With a sweet and delicious taste.
The safety of cyclamate is controversial
Some businesses add sweeteners when processing ordinary corn or sweet corn that is not sweet enough to attract consumers. Sodium cyclamate is a commonly used sweetener. Sodium cyclamate, also known as sweetener, has a chemical name of sodium cyclamate. The sweetness of cyclamate is 50 times that of sucrose. It does not provide energy, nor does it cause blood sugar to rise. Therefore, cyclamate was originally used by people to replace sucrose in foods. At the time, this was undoubtedly a good news for diabetics: You can enjoy sweetness without worrying about raising blood sugar. The application of cyclamate is also becoming more and more widespread, and it has its own traces in food, medicine and cosmetics.
However, the safety of sodium cyclamate is more controversial. In 1968, the US Food and Drug Administration found that cyclamate may have teratogenic, carcinogenic and mutagenic effects in rats. In 1969, American medical researchers used rats to perform toxicological experiments on cyclamate in rats, and found that rats showed symptoms of testicular atrophy and testicular weight loss. It was speculated that the reason may be that cyclamate is decomposed by metabolism of the gastrointestinal tract during metabolism. The toxic substance cyclohexylamine, this experimental result also led directly to the United States National Science Research Council rejected cyclamate. Subsequently, in 1970, the US FDA banned the use of cyclamate as a food additive. However, the safety assessment of sodium cyclamate did not stop there. In the 1990s, the United States National Cancer Institute (NCI) and the FDA also conducted two re-examinations. The result is that the existing evidence is not enough to prove that cyclamate is carcinogenic. In spite of this, the United States still prohibits the use of cyclamate in food.
China does not allow cyclamate in fresh corn
In 1982, the Food and Agriculture Organization of the United Nations reviewed the carcinogenicity of sodium cyclamate and concluded that cyclamate is not carcinogenic. Therefore, although the United States, Britain, France, Japan, and other countries ban the use of cyclamate, there are also many countries, including China and Australia, more than 80 countries are allowed to use cyclamate in food. In China, cyclamate is mainly used in carbonated beverages, canned foods, candied fruit, pickles, biscuits, and bread. At the same time, the national standard also defines the amount of its use. However, cyclamate is not allowed in fresh corn, nor is it allowed to be used in fried puffed foods. Therefore, if anyone uses it, it is definitely a violation. However, this does not mean that eating such food will be harmful. People do not need to worry too much. FAO/WHO states that the daily allowable intake of cyclamate has an ADI value of 0 to 11 mg/kg bw, which means that for an adult weighing 60 kg, it must not exceed 660 mg per day. The sweetness of cyclamate is 50 times that of sucrose, and the sweetness of 660 mg cyclamate is equivalent to 330 grams of sucrose. For normal people, it is impossible to eat such polysaccharides every day.
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