(1) Complete protein. This protein contains all kinds of essential amino acids, and the quantity is sufficient and the proportion is appropriate. This protein can not only maintain human health, but also promote growth and development. It belongs to high-quality protein, which is good protein. Protein in milk, eggs, fish and meat belongs to complete protein and is an ideal source of human protein.
(2) Semi-complete protein. This kind of protein is characterized by a complete range of essential amino acids, but the quantity of some amino acids can not meet the needs of the human body, and the proportion is not appropriate. They can sustain life, but they can't promote growth and development. For example, gliadin in wheat is semi-complete protein and contains almost no lysine. This protein is between good and bad, but it is still an important source of protein in daily diet.
(3) protein is incomplete. That is, what we call bad protein contains many essential amino acids. If we only rely on them, we can neither promote growth nor sustain life. For example, collagen in skin, collagen in corn, globulin in peas, etc.
The fastest way to lose weight in protein.
Protein hydrolysate can help people lose weight, which is beneficial to water metabolism, so girls with long-term edema can try this diet. In addition, protein has a relatively large molecular weight, so it can maintain a long satiety and help you control your diet and food intake. Protein can also inhibit the production of fat, while protein will not be converted into fat, but will only be metabolized, so it is a good diet food.
What foods are high-quality protein?
Compared with those expensive abalone, sea cucumber and bird's nest, it can be compared with milk, eggs and tofu. Let's talk about tofu first In fact, cheap bean products are really rich in protein and have high nutritional value. Protein is a high-quality protein with high content. Much higher than bird's nest. And in plant food, the amino acid composition of bean products is relatively reasonable. Its composition and proportion of essential amino acids are similar to those of animal protein, and it is a natural and ideal supplementary food for grain protein. There are many kinds of tofu, including soft, hard, pickled, smoked and stewed. Either way will do.
Harm of protein's Excessive Intake
1, damage to kidney. Although protein is our most important substance, we should not consume too much. If you eat high protein for a long time, it will increase renal blood flow and glomerular filtration rate. American scientists have analyzed that for people with healthy kidneys, a high-protein diet is harmless to the kidneys. But for people who already have some kidney problems, every meal with high protein, especially high animal protein, will bring obvious acid metabolism burden to the kidneys and increase the risk of stone formation.
2, it will increase the amount of calcium in urine. Eating a high-protein diet will increase urinary calcium excretion, which has been confirmed by animal and human experiments. To observe the effect of high protein diet on calcium metabolism. On the basis of an average daily intake of 67 grams of protein, 40 grams of egg white protein was added, and it was found that the urinary calcium excretion increased significantly. Long-term excessive intake may increase the risk of bone loss.