a good bird's nest should be thin and dense (as if there were no gaps). The whole shape is very good, with a little fishy smell, dry to the touch (keep less water), with a small amount of fine hair and thin swallow horns. In addition, the color of bird's nest can be divided into shades and shades.

every 1g of bird's nest contains 1.4g of water, 57.4g of nitrogen, trace fat and 8.7g of ash. Protein of bird's nest is mainly composed of arginine, cystine, histidine, tryptophan and tyrosine. Bird's nest is also rich in calcium, phosphorus, potassium and sulfur. According to the latest medical experiment report of the Chinese University of Hong Kong, the cytokinin and epidermal growth factor of bird's nest can promote the reproduction and regeneration of human cells, and the aqueous solution of its active glycoprotein can directly stimulate the cell growth of the immune system. Promote human metabolism, enhance functional efficacy, and can nourish yin and tonify kidney, moisten lung, care skin, eliminate heat and strengthen spleen after long-term consumption. The effect is more significant for children, the elderly, the weak and the sick.