Core Tip: How high is the nutritional value of crabs? Most people have only heard of "high-protein" legends. Others are probably very few words. Its protein, really so high?
Autumn winds, crab fat. In this country, every time the autumn equinox, the two-legged shelled monster does not know how many animals will roar up and walk up the locusts in the animal body. The inability to eat is not enough to comfort the heart. This turmoil, like the tide of the Qiantang River, has almost become an annual natural phenomenon.
Speaking of it, eating crabs is a technical task. Eating complicated and time-consuming requires a lot of learning exercises. It's hard to avoid getting rid of them. When the TV station was doing crab eating, foreign friends did not understand why Chinese people were so attached to eating crabs. Some diet researchers have even speculated that it was because of the scarcity of food in ancient China and the difficulty in obtaining large pieces of meat. People had to use the flesh of these hard-edged crucibles in their legs.
From an ecological point of view, this possibility does exist, because for the Chinese people, there are indeed no animals who dare not eat, eat, or eat well. "We are really the only animals on Earth that have nothing to eat..." (Lin Yutang) But this claim has always been dismissed by Chinese writers. This is because in our country of cuisine, the literati, the magistrates, and the loyalists are all glorified as a gourmet. Crab Eating Wine Enjoy the fun of Judy's poetry. The meticulous production of eight “crabs†for eating crabs is not a hungry, but half-dead, poor person. Only those who have plenty of food can have the kind of Yaxing.
However, what is the high nutritional value of crabs? Most people have only heard of "high-protein" legends. Others are probably very few words. Its protein, really so high?
According to the data of each food composition table, crab is indeed considered a high-protein food. According to fresh weight, the protein content of 100 grams of crab meat is about 15%-18%. This value seems to be less than 20% higher than that of chicken and beef, but it is not calculated. Because crab meat has a particularly high moisture content and a particularly low fat content, its protein content is quite impressive if it is calculated on a dry weight basis, which accounts for 70% to 90% of dry weight. This height, but other foods are difficult to achieve.
Soybeans said it was high in protein and the chicken laughed. Soy protein accounts for about 40% of dry weight, while protein in peeled chickens can reach up to 70% of dry weight. For example, chicken breast is an example of daily high-protein foods.
Chicken said it was high protein and the crab laughed. According to the American Food Composition Database, the protein content of crab meat is approximately 18%, while the moisture content is approximately 80%, and the protein content of crab meat is as high as 90% on a dry weight basis. Even if the crab and other parts are counted, the ratio of protein to dry weight is as high as 70%.
So, if you eat a lot of crab meat, the demand for proteases in the digestive tract will be great. If protein foods are eaten on weekdays, the protease work is not very effective. Suddenly eating large amounts of crab meat can be a considerable challenge for the digestive system.
Crab meat contains rich magnesium, and calcium content is also high. For example, the calcium content of crabs exceeds the level in milk, and some varieties can reach 200mg/100g or more. In addition, the contents of trace elements such as zinc, selenium, and iodine in crabs are also quite high, especially selenium, which is much higher than ordinary meat.
From the perspective of vitamins, the vitamin A content of crabs is more commendable, ranging from 1.5 to 2 times that of eggs, but it is almost always present in the crab yellow portion, and the content of white crab meat is almost negligible. The level of vitamin B is similar to that of most fish. The content of vitamin B1 is lower than that of meat. Vitamin B2 is slightly higher, but it is also mainly found in crab yellow, and white meat is low in content.
The cholesterol content in crab meat is higher than that of meat, and it is close to the level of internal organs such as the liver. Among them, crab yellow has higher cholesterol content than crab meat. Although people always have scruples about cholesterol when eating eggs, they rarely have such fears when eating crabs, and almost no one is willing to give up that delicious crab yellow, perhaps because of the current fearlessness of food.
Here, people may have a general understanding of the overall nutritional properties of crabs: high protein, low fat, no starch. High cholesterol, rich vitamin A, more calcium, more magnesium, more selenium and iodine, less vitamin B1, no dietary fiber
What happens to such food if it is eaten for dinner?
There may be a friend who said: Who will eat fresh seafood such as crabs? Don't say that people really do. Coastal residents, it's not uncommon to have some fish, shrimp and crab shells at dinner, add some vegetables and drink some little wine. Even the inland residents occasionally have a chance to eat fresh seafood, and they must not let go. They always hold the principle of “let me eat once,†and wait for the wall to support the wall. Where can I still eat a bowl? Rice, slowly greet the crabs and shrimps?
However, the result of such eating is often hunger in advance and the body becomes thinner.
This is because aquatic products such as crabs and shrimp and shellfish have relatively low energy content, but their satiety is relatively strong in a short time. Even if you eat two pounds of crab, the pure meat after shelling is only 8 or more, about 400 grams, containing 60-70 grams of protein, to meet the needs of an adult man's day, only about 400 kcal energy, and a man The usual amount of dinner (more than 800 kcal) is far away. Adding a little vegetable is also a low-energy food. Coupled with the strong thermal effect of protein, 30% of the energy will be transformed into heat, which is actually used by the body.
Therefore, we can understand that many people do not eat and eat seafood. They feel full and feel hungry after two or three hours.
Last time I went to Shenzhen, a middle-aged man asked me, how can I increase my weight? I eat a lot, but it's always lean. In addition to his hard work, I personally speculated that, to a large extent, it is related to his eating habits. He loves seafood fish and basically does not eat staple food at night and uses aquatic products as a meal. Because of the fear of drinking beer and seafood or fruits that are harmful to health, they only drink a few small mouthfuls of liquor and eat a few more vegetables. According to this way of eating, nature is unlikely to gain weight.
If you mix seafood or porridge while you are eating seafood, it is not prone to protein overdose and you will not feel hungry after eating. Because of the “dilution†of starch, proteins do not enter the gastrointestinal tract so densely that they are not excessively wasted as energy. At the same time, they reduce the burden on the digestive tract, liver and kidneys, and make the body feel more comfortable. More relaxed.
Therefore, whether it is crab, shrimp, shellfish, all kinds of delicious fish and lean meat, are not suitable for eating. According to the recommendations of China's dietary guidelines, the appropriate amount of aquatic products per day is 75-100 grams. Converted into crabs, about 250 grams of crabs can be eaten.
No matter how delicious the crabs are, it is not wise to eat three or four crabs. It is only sensible to use it as a dish and enjoy it with other foods. If you really care about health, you still have to follow the principle of “grains for nutrition.†Even if you eat a half bowl of staple food, it will be better for you than eating seafood alone.
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