God 9 has caused everyone's curiosity about astronauts and aerospace diets. Why is the astronaut's dietary requirements so high? In the days of space, is their diet based on animal foods such as milk, fish, meat, and eggs? Those imported high-grade deep-sea fish, they eat it every day?
It's not a big deal.
Fan Zhihong, associate professor of nutrition and food safety at the Food College of China Agricultural University, said that due to the extremely stringent physical and mental health requirements, dietary nutrition and diet safety of astronauts are very important. During the mission, they can't freely experience “happiness at the tip of the tongue†like normal people, but they must be carefully crafted by space nutrition experts.
In other countries as well, the astronaut’s food quality is certainly higher. If raw materials contain pathogenic bacteria and parasites, or contain unknown chemical pollution, even if the nutritional value is low, it will bring extra burden on the internal organs of the astronauts, even if it does not exceed the human body's ability to respond to the ground, It may affect the astronauts' status and safety in space.
From the information we have seen so far, the astronauts can’t live without milk, fish, meat, eggs, and aren’t the astronauts’ foods dominated by animal food?
Fan Zhihong said that human health requires protein. If it is not vegetarian, there is no need to reject animal protein such as fish, egg, and milk, but it does not need to be excessive. Our dietary guidelines recommend eating 50-75 grams of lean meat, 75-100 grams of fish or other aquatic products every day.
Fan Zhihong said that astronauts must also eat enough fruits and vegetables and a variety of staple foods daily, and it is by no means a big deal for people to eat. The daily life must be a diet based on natural conditions, just like the opinions of nutritionists.
We can see that the diet of the astronauts has not been affected by rumors such as “milk is a cow to drink, not a human to drink†or “high cholesterol in eggs, eating eggs can cause premature deathâ€. Fan Zhihong pointed out that milk is protein, calcium,
A good source of vitamins such as VA, VD, VB2, VB6, and VB12. Eggs can supply protein, lecithin, and 12 vitamins. It is also a good source of health ingredients such as lutein. The Chinese Nutrition Society advocates healthy adults daily 300 grams of milk, half to one egg.
Not necessarily all natural
Many reports mentioned that astronauts eat squid, grass carp, squid, duck eggs, and pork. Why aren't they other fish and meat?
Fan Zhihong said that the astronauts' diets mentioning these kinds of foods does not mean that they do not consume other raw materials. Carp, grass carp, and carp are the traditional fish species in China. They grow generally in aquaculture waters and are relatively easy to obtain. From here, people have seen that astronauts do not specifically eat imported high-grade deep-sea fish, because the nutritional value of fish and the selling price are not completely related.
In addition, whether or not the aerospace foods are all natural, Fan Zhihong said that astronauts can't naturally eat the space food they eat in space. In addition to assuring easy access to food under aerospace conditions, aerospace foods also attach great importance to avoiding pathogenic microorganisms. Many foods are subjected to high-temperature sterilization or radiation sterilization, and care must be taken to ensure that there is no waste or slag. Space food experts have repeatedly disclosed that, in addition to natural foods and foods with low moisture content, astronauts' foods include freeze-dried foods, canned foods and so on.
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