Nitrite has certain toxicity. Toxicological analysis showed that the semi-lethal dose of nitrite to decayed animals was 57 mg/kg. According to this amount, normal adults will not reach the toxic dose unless they eat nitrite directly as salt. Judging from the current poisoning cases, acute nitrite poisoning usually only occurs in infants with poor metabolic ability or people who eat a lot of nitrite by mistake.

In fact, the most worrying thing about nitrite is its chronic toxicity. Because nitrite reacts with protein decomposition products under acidic conditions, nitrosamines are easily produced, and nitrosamines are recognized as carcinogens. Because the pH in human stomach is just suitable for the formation of nitrosamines, nitrite will increase the risk of cancer.

Key points of selecting Toona sinensis:

First, try to buy short ones, which are tender, and the longer the toon, the older it is;

Second, observe the color. The fresh leaves of Toona sinensis are brownish red and are not easy to be pulled off. If the leaves of Toona sinensis are green and fall off when touched, it means that they are old.

Third, look at the thickness. If the stem of Toona sinensis is thick, it means that it is a new bud, and the stem is thin, which means that it is an old Toona sinensis. In addition, the harder the stem, the older the Toona sinensis;

Fourth, if you can smell the fragrance when you buy Toona sinensis, it means it is relatively fresh. If you smell a bad smell, it is probably Toona sinensis and cannot be eaten. ?

The above content refers to People's Daily Online-Eating Toona sinensis causes cancer? Please rest assured!