With the increase of age, the absorption capacity of the elderly for nutrition gradually decreases, and anabolism becomes slow. Due to the poor quality of protein decomposition, the elimination in vivo and in vivo increased. The decrease of free amino acids in the body leads to the decline of renal function. From the perspective of health care, bird's nest can enrich protein and prevent the occurrence of various diseases. From the perspective of health care, bird's nest can regulate human immunity, and long-term consumption can achieve the effect of delaying aging. 1. Supplementing protein (balancing nutrition and improving immunity) protein is the material basis of all life, an important part of body cells, and the main raw material for human tissue renewal and repair. When people get old, the body's resistance will drop significantly; If you encounter surgery again, it will be more difficult for your body to recover. Both children and the elderly need to be supplemented with a certain amount of protein. Common protein powder and protein health care products on the market cannot be well absorbed and utilized by human body, and it is difficult to achieve ideal results. Health preservation (delaying aging and prolonging life) can make people live longer and keep healthy. Protein's nutrition gradually permeates and acts on human body. Of course, protein's supplement is also about dosage and duration, and overeating is not allowed in one day, and it is not allowed to happen regularly. The five expensive things will persist for a long time. People who often eat food containing protein are in excellent mental state, so it is difficult to guess their real age.