First, the appearance characteristics are different.
1, Golden Bird's Nest: Bird's Nest absorbs different minerals and is golden yellow in color.
2. Bai Yan Bird's Nest: It is generally milky white or off-white. After a long time, the color of bird's nest will gradually change from pearl white to off-white.
Second, the calcium content is different.
The difference from Bai Yan is mainly due to the high calcium content in food in a certain area of Jin Siyan, so the calcium content of bird's nest is also high, and it turns yellow after oxidation, so the calcium content of Huangyan is higher than that of Baiyan.
Extended data:
Jin Siyan and many other kinds of swallows nest on the rocky cliffs by the sea. The nest is mainly composed of saliva secreted by these birds, mixed with feathers and other substances.
In fact, many scientists have analyzed the ingredients of bird's nest. The results showed that the main components of dried bird's nest were protein and carbohydrate, accounting for 55%-65% and 25%-30% of the total weight respectively. Then there is water, the content is between 5%- 15%, and the rest are some minerals, such as calcium, sodium, phosphorus, iron and potassium.
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