The requirement of protein is related to the quality of meals.
1985, FAO/ WHO put forward that the requirement of protein is 0.75g per kilogram of body weight per day for men and women, in order to perfect protein (high-quality protein). The dietary composition in China is mainly plant food, and its quality and digestibility in protein are poor. Therefore, the recommended intake of protein is1.16g/(kg d) for adults and1.27g/(kg d) for the elderly.
Secondly, too much protein itself will also have harmful effects:
Under normal circumstances, too much protein must be deaminated and decomposed, and nitrogen is excreted through urine, which increases the metabolic burden. Moreover, this process requires a lot of water, which increases the load on the kidneys. If the renal function is not good, the harm is even greater. Excessive intake of animal protein also leads to excessive intake of sulfur-containing amino acids, which will accelerate the loss of calcium in bones and easily lead to osteoporosis.
Extended data:
Nutritional components of eggs
According to the analysis, every100g of eggs contains12.8g of protein, mainly ovalbumin and ovalbumin, and contains 8 kinds of amino acids necessary for human body, which is very similar to the composition of human protein. The absorption rate of protein in eggs can reach 98%.
Every100g of egg contains11~15g of fat, which is mainly concentrated in yolk and easily digested and absorbed by human body. Egg yolk is rich in lecithin, sterol, egg yolk, calcium, phosphorus, iron, vitamin A, vitamin D and B vitamins. These ingredients have great benefits for improving the function of the nervous system, so eggs are better brain food.
An egg contains half an apple or half a glass of milk, but it also contains 8% phosphorus, 4% zinc, 4% iron, 12.6% protein, 6% vitamin D, 3% vitamin E, 6% vitamin A, 2% vitamin B and 5% vitamin B2.
These nutrients are essential to the human body, and they play an extremely important role, such as repairing human tissues, forming new tissues, consuming energy and participating in complex metabolic processes.