Bird's nest is a health care product, which has no obvious effect in the short term. If conditions permit, it is best to take it for a long time or often. It doesn't contain hormones, and its effect is slow, which is related to the law of food intake: generally, you can stick to the range of 3-5g, eat once every other day, get up early on an empty stomach or eat once before going to bed at night, and more than 90% of friends who interrupt for less than 5 days a month will have different feedback within 3 months. Some people have moist skin, some people seldom get sick, some people are full of energy, many people react that bird's nest can promote metabolism in new town and reduce constipation, and some people react that sleep becomes better.