Bird's nest contains many healthy substances, so it is more or less healthy. Is this a fact? Scientists carefully analyzed the chemical composition of bird's nest. Dried bird's nest contains about 50% protein, 30% carbohydrate, 10% water and some minerals, and does not contain any magical things. The protein content of bird's nest is very high, but it is lower than that of tofu skin and pig skin. Moreover, studies have shown that protein in bird's nest does not contain all kinds of essential amino acids, so it cannot be regarded as a high-quality protein. In fact, for human beings, the best quality protein exists in daily food, such as milk and eggs. There are also some health care products manufacturers advertising: "Bird's nest contains collagen, which can maintain the skin; At the same time, there is epidermal growth factor, which can delay aging. " Indeed, collagen can maintain skin elasticity, and epidermal growth factor can stimulate skin renewal. But if you take these protein orally, it won't have any effect. Because the structure of most oral proteins will be destroyed and irreversibly lose their activity, not to mention reaching the right place to play a role. Especially skin growth factor, its half-life in human body is less than 10 minute, and it will be denatured in the environment with pH less than 6.5, so skin growth factor will be quickly inactivated in gastric acid with pH less than 3. Similarly, the view that eating collagen can beautify the face is just a tonic view of "what you eat supplements what you eat". Moreover, the role of collagen is to firmly fix bird's nest on the cliff in the sea breeze. This tough protein is not easy to be digested and absorbed by human body, and it will excrete a considerable amount of oral collagen. Therefore, the nutritional value of bird's nest is far less than that of protein, but the price is much more expensive.
The effect of beauty care depends largely on personal feelings, and personal feelings are largely determined by psychological effects. In order to eliminate the interference of psychological factors, scientists need a large-scale randomized double-blind experiment to determine the beauty and health care efficacy of bird's nest. But so far, there is no convincing human experimental results to prove this. In the United States, any advertisement for bird's nest must indicate that this product cannot be used to diagnose, treat or prevent diseases. In sharp contrast, large-scale statistical results show that bird's nest is becoming one of the most important causes of allergic reactions in Asia. In Singapore, a survey of 868 children with acute allergies shows that bird's nest has surpassed seafood as the largest source of allergies. Allergic symptoms caused by bird's nest include rash, asthma and even shock.
Bird's nest exported from Singapore and Indonesia to China was found to contain excessive heavy metals. If pregnant women eat such bird's nest, it will increase the teratogenic rate of the fetus. Many businesses add bleach to clean bird's nest. Eating such bird's nest will not only have no health care effect, but also bring harm to health.