Although this phenomenon has become a "celebrity stalk on the Internet", the nutritionist in the explosive nutrition class is more worried that everyone will eat walnut leaves by mistake. After all, this is equivalent to eating "fake Chinese toon".
And will there be a phenomenon of using walnut leaves as Toona sinensis buds in the market? It's hard to say. Therefore, it is particularly important to learn to distinguish between walnut leaves and Toona sinensis buds:
The trunk of Toona sinensis is dark red with few branches. The whole trunk looks straight and upright, and the leaves are soft and smooth, like willow leaves, with a strong and unique fragrance.
The bark of walnut tree is gray-black, the branches are scattered, and the leaves are generally oval or oval, which feels rough and uneven and has no obvious taste.
I believe that after you see this, you will know how to distinguish Toona sinensis from walnuts. As a kind of wild vegetable in spring, Toona sinensis is often called "the king of wild vegetables" among the people. Dietary fiber is not only high in content and low in energy, but also rich in various minerals such as calcium, iron and zinc. It is recommended to eat often in spring.
But there are also a few people who dare not eat Toona sinensis, because it is often said that Toona sinensis is a carcinogen on the Internet, but it is not as terrible as everyone thinks:
Toona sinensis does contain a lot of nitrite, which will react with the decomposition products of protein to generate nitrosamines, and "nitrosamines" have been identified as carcinogens.
However, for all "toxic substances", the content does not mean exceeding the standard, and the existence does not mean that it will definitely cause cancer. Nutritionists in the explosive nutrition class often say that any toxicity theory without dose is hooliganism.
For Toona sinensis, the content of nitrate and nitrite in Toona sinensis is at the lowest level during germination, and most people eat "Toona sinensis buds" in daily life.
The nitrite content of Toona sinensis varied from 1.475-2.778 μ g/g during the whole growth cycle, and the daily allowable intake of nitrite set by WHO was 0. 13 mg/kg body weight. Then let's give you a specific conversion:
Taking a 60 kg adult as an example, the daily allowable dose of nitrite is 7.8 mg. If you want to eat Toona sinensis, nitrite poisoning, according to the maximum nitrite content of Toona sinensis, you need to eat at least 2.8 kg Toona sinensis. Come to think of it, who can eat so many Toona sinensis at once?
On the other hand, Toona sinensis will go through blanching and other steps in the cooking process, which can also reduce the content of nitrite to a certain extent, so you don't have to worry about eating Toona sinensis will cause cancer.