Bird's nest is very expensive, which is determined by its own therapeutic value and market demand.
Dietotherapy value:
Bird's nest is the food with the highest sialic acid content in nature. Sialic acid can promote infant brain development and improve human immunity.
Bird's nest also contains epidermal growth factor EGF, which has remarkable cosmetic effect.
Bird's nest nourishing stomach and moistening lung is also very effective in asthma. From ancient medical books, we can see that "Herbal Rejuvenation" records: "Bird's nest greatly supplements vitality, moistens lungs and nourishes yin. Treat fatigue and cough. " Medicinal properties of Yaolin: "Bird's nest is sticky, especially for drying phlegm." "New Materia Medica": "Bird's nest cures lung fire, cough with excessive phlegm, cough with asthma due to qi deficiency, blood loss and strain." "Wen Tang Ji Fang Jian" treats phlegm and asthma: "Autumn, Pak Lei alone, after removing his heart, put one yuan into the bird's nest, boil water first, and then steam it with one yuan of rock sugar. Take it continuously every morning. " According to Ben Feng Jingyuan, bird's nest can make the golden water grow together, nourish the lungs with kidney qi, and keep the stomach qi safe, so it is the most docile kind of food. "Seeking Truth from Materia Medica" records that bird's nest is used to fill the stomach, so that it will not be dry and wet, while those that are the most flat and beautiful in medicine are difficult to get in because they are in vain, and often effective.
Demand exceeds supply:
Bird's nest is mainly produced in Indonesia, Malaysia, Vietnam and Thailand, with a certain annual output. Although efforts have been made to increase the output in recent years, due to the wild nature of Jin Siyan, the output cannot be greatly improved. In terms of market, in addition to the tradition of eating bird's nest in Hong Kong, Macao and Taiwan, the number of people eating bird's nest in Chinese mainland has also increased rapidly in the past decade, and even Japan and South Korea have begun to eat bird's nest in recent years. Therefore, the current bird's nest market is generally in short supply, and the price naturally rises.
PS: Off-topic: Because of this, there are too many fake bird's nests on the market. Brush, bleach and gain weight. If you don't understand this, you can talk in private.