Amway? ! The equivalent of China's Dabao!

it's not very useful, and protein powder and so on are all deceptive tricks.

It is generally believed that protein powder has the health-care function of enhancing immunity, and some products spare no effort to publicize the health-care function of protein powder in the promotion process. But in fact, among the 22 products tested this time, it is just ordinary food.

-protein powder should be used with caution. Healthy people don't need protein powder.

This summer, various brands of protein powder are very popular in the market. Protein powder attracts consumers with its healthy and nutritious characteristics, and becomes the new favorite of people to visit relatives and friends and honor their parents. However, it is worrying that consumers' knowledge of protein powder mostly comes from advertisements and product descriptions, so there is a certain one-sidedness or even misunderstanding. So, what is the function of protein powder, should normal people eat protein powder and how to eat protein powder correctly?

What's the role of protein

protein is the basic component of the human body, accounting for about 18% of the total weight of the human body. All tissues and cells in the body contain protein, and all metabolic activities in the body are inseparable from protein. Some substances with important physiological functions, such as hormones, antibodies and plasma proteins, are essentially protein or peptides.

The basic unit of protein is amino acid, and there are more than 2 kinds of amino acids related to human body. The composition and quantity of amino acids in various protein are different. As a result, thousands of protein have been formed. Although the human body needs all amino acids, most amino acids can be synthesized by the human body itself or transformed from other amino acids. Therefore, in fact, there are only 8 kinds of amino acids that adults need to ingest from the diet and 9 kinds for children, which we call essential amino acids. As long as the diet contains the appropriate amount and proportion of essential amino acids, it can meet the needs of the human body for amino acids. Some manufacturers say in advertisements that "the product contains more than 2 kinds of amino acids", which is actually stealing the concept and misleading consumers.

Healthy people don't need to eat protein powder

According to the Reference Intake of Dietary Nutrients for China Residents, the intake of protein per adult per day is 65-9g, or 1%-12% of the total energy can meet the metabolic needs. In addition, protein intake varies with people's age, weight and labor intensity. The demand of children and adolescents during their growth and development, pregnant or lactating women in protein is generally higher.

For healthy people, as long as they adhere to a normal diet, the lack of protein will generally not happen. Milk, eggs, meat, soybeans, wheat and corn contain all kinds of essential amino acids, with sufficient quantity and proper proportion. Therefore, as long as we insist on rich and diverse foods, we can completely meet the needs of human body for protein, and there is no need to supplement protein powder. Moreover, the psychological enjoyment and sensory stimulation brought by food can not be replaced by protein powder.

Eat protein powder in moderation

For special people who need it, in addition to supplementing essential amino acids through food, protein powder can be appropriately selected as a supplement to protein, but the dosage of protein powder must be paid attention to. After protein is digested and absorbed by gastrointestinal tract, it needs to be processed by the liver and converted into human substances for human use. At the same time, nitrogen-containing substances such as ammonia, urea and creatinine, which are products of protein's metabolism in the body, need to be excreted by the kidney. If a person eats too much protein, it will increase the burden on the liver and kidney, which will have a negative impact on the human body. Therefore, protein is by no means the more the better. The highest intake of protein proposed in Dietary Guidelines for China Residents is .92g per kilogram of body weight, and if it exceeds this amount, it may harm human health. As a matter of fact, protein only needs to meet the needs of human metabolism. After the excess protein is digested and absorbed, the liver will convert them into hepatic glycogen or muscle glycogen for storage; If liver glycogen or muscle glycogen is enough, it is converted into fat and stored; Other metabolites produced by this transformation must be excreted from the kidneys. Excess protein not only makes people obese, but also increases the metabolic burden of liver and kidney, which may affect their functions over time.

It should be reminded that when we supplement protein, we should also pay attention to supplement carbohydrates (sugars), lipids, vitamins and minerals. Because the lack of these nutrients will not only affect the utilization and metabolism of protein, but also cause some diseases, which is very harmful to health.

Who should use protein powder with caution

1. Patients with kidney diseases should strictly limit the intake of protein, and protein containing 9 essential amino acids is the main ingredient. The amount of protein should be limited to 2 ~ 4g/day.

2. Patients with liver diseases should appropriately increase the intake of protein due to the obstacles in the processing and utilization of protein by the liver. However, for patients with hepatic coma and advanced cirrhosis, too much protein will increase the burden on the liver and aggravate the condition, so animal protein should be restricted. Because of its metabolism in the body, it will produce more ammonia, which can induce or aggravate liver coma, so such patients can choose some plant proteins rich in branched-chain amino acids, especially soybean proteins. Because branched-chain amino acids are mainly metabolized in muscles, they have protective effects on liver function.

3. Newborns should not eat protein powder. They should choose milk powder with protein content of 1% ~ 2%.

4. Gout patients should avoid eating protein powder with soybean protein as the main component. Because the purine in soybean can increase uric acid in the body and promote or aggravate gout. (End) (Professor Wang Jin, Ph.D., Clinical Nutrition Department, Shanghai Changhai Hospital, Donglian Cai)