The functions of the bird's nest are simple. Unlike most other foods we eat, most of them are whole-cell foods and are rich in organic raw materials. From the perspective of nutritional value, bird's nest is only a low-grade food with limited nutrition.

Wen _ Xun Zheng (Master of Surgery, Doctor of Health Management, Assistant Professor, University of Iowa Medical School, USA)

With the development of China's economy, bird's nest is increasingly in short supply.

The only people in the world who swallow saliva are the Chinese, and Hong Kong has always been the center of world bird's nest trading. In 1975, the wholesale price of one kilogram of bird's nest was 10 US dollars, 40 times more than 20 years later, rose to 400 US dollars. By 2002, it had risen to 1,600 US dollars per kilogram, and the retail price rose to 8,000 US dollars per kilogram.

As the demand from China continues to grow and prices have soared, huge benefits have given birth to the bird's nest industry. In Southeast Asian countries, especially Indonesia, in recent years, the bird's nest industry has become large-scale. The bird's nest has created about 0.5% of GDP for Indonesia. Almost all of it is used for export, and local restaurants do not see bird's nest-based dishes.

The bird's nest companies follow the natural habitat of swiftlets to build "household projects" for the swallows to attract or nurture swallows to build nests, and to obtain bird nests built from swallows. The locals used to call this type of project a swallow hotel, and some even called their own project a five-star swallow hotel, providing safety measures, drinking water, food and bathing equipment for the swallows.

The heat of the two bird's nests is equivalent to two or two meters of cake

The bird's nest contains 50% protein, 30% carbohydrates, 5% iron, 3% other minerals, and 1.4% cellulose. The protein of the bird's nest is mainly mucin (in other words, saliva) secreted by epithelial cells, in which it contains only one essential amino acid (lysine) and three conditional (excessively lacking) essential amino acids.

The human body needs 8 kinds of essential amino acids and 13 kinds of conditional essential amino acids. Therefore, the nutritional value of the bird's nest is extremely low. This has been confirmed by animal experiments. Feeding rats with a bird's nest plus another single ingredient food produces protein malnutrition. In other words, the nutritional value of bird's nest protein is in quantity, not quality. However, the consumption of “occasionally” people is generally insignificant in terms of quantity. Therefore, the nutritional value of the bird's nest in terms of protein is still far inferior to various high-protein foods such as meat and soybeans.

Carbohydrates are not nutritionally significant for people who are not deficient in nutrition. Two or two bird's nests can provide 345 kcal of calories, which is equivalent to 22m rice cakes or bread, and the price difference is tens of thousands of times.

Speaking of iron and mineral content, bird's nest is indeed a leader. However, the minerals in the bird's nest, especially in blood swallows, are derived from the penetration of natural minerals or impurities introduced into the nests of swallows. These minerals are inorganic substances that the human body absorbs little or none of them, so its nutritional value. Can be ignored.

The last nutrient component is cellulose, which is normal in content and eats an apple to match the cellulose contained in 4 bird's nests.

All in all, the bird's nest has a single function, unlike most of the other foods we eat, most of which are whole-cell foods, rich in organic raw materials, and the nutritional value of bird's nest is a low-grade food with limited nutrition. .

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