Fresh Toona sinensis buds picked from trees are safe to eat immediately, while the nitrite content of Toona sinensis buds bought from the market will increase greatly because of the transportation process. If the leaves fall off as soon as they touch, they must produce a lot of nitrite. During the process of picking, transporting, cleaning and heating, Toona sinensis lost a lot of nitrate. Moreover, it is best to have a fragrant spring about 10 a year, eat it several times a year, buy 2 or 3 scrambled eggs at a time, or eat it for the whole family, and the share for everyone is almost negligible!

Toona sinensis does contain nitrate and carcinogenic nitrite. But the content of nitrite is not high. Toona sinensis also contains a lot of vitamin C, which can block the production of nitrite, so eating Toona sinensis will not cause cancer due to the intake of a lot of nitrite. Nitrite is undoubtedly a carcinogen, the main harm is that it will combine with hemoglobin to produce carcinogenic nitrosamines after entering the human body; Toona sinensis does contain it, but the content varies greatly according to the variety and origin.

Moreover, nitrate can only be converted into nitrite under certain circumstances, and Toona sinensis is rich in vitamin C, which can block the formation of nitrite, so nitrate is not so easy to be converted into nitrite. Nitrate and nitrite are widely used in human life, and they are ubiquitous nitrogen-containing compounds in nature. Its appearance and taste are similar to salt, which is widely used in industry and construction, and is allowed to be used as colorant and additive in meat and other foods.

Toona sinensis is rich in protein, low fat, vitamin C, vitamin B 1, vitamin B2, calcium, potassium, dietary fiber and polyphenols, which stand out among many vegetables. However, the contents of nitrate and nitrite in Toona sinensis during germination are actually in the lowest state, and gradually increase with time. But we usually use Toona sinensis buds, so the content of nitrate and nitrite should not be too high.