Inorganic salts, calcium, phosphorus and iron are abundant, so egg yolk is a good source of iron for babies. Vitamin A, vitamin D and riboflavin are the main vitamins.
1. Eggs, also called chicken eggs and eggs, are laid by hens. They have a hard shell outside, and there are air chambers, egg whites and yolk inside. Eggs can be divided into three parts: shell, protein and yolk. Eggs contain a lot of vitamins and minerals and protein with high biological value, which is one of the foods commonly eaten by human beings. In August, 20 15, archaeologists discovered eggs as funerary objects in Chishui, presumably with a history of more than 2,000 years.
2. protein is a semi-flowing colloidal substance in the skin under the shell, accounting for 57%-58.5% of the whole egg. Protein contains about 65438 02% protein, mainly ovalbumin. Protein also contains a certain amount of riboflavin, nicotinic acid, biotin, calcium, phosphorus, iron and other substances.
3. protein is divided into concentrated protein and diluted protein. Dense protein: protein near the yolk, with high concentration. Dilute protein: A part of protein near the eggshell with low concentration.
4. Most of the yolk lives in the center of protein, and it is hung at the two poles through a tie. The volume of yolk accounts for about 30%~32% of the whole egg. The main component is vitellin, and the fat content is 28. 2%. Most of the fat belongs to lecithin, a kind of phospholipid. From the point of human nutrition, egg yolk is rich in vitamin A and vitamin D, and contains high iron, phosphorus, sulfur, calcium and other minerals. There is a blastoderm in the yolk.
Extended data:
Egg protein
chemical composition
Egg white has at least three layers, the outer layer and the inner layer are relatively thin, and the middle layer accounts for about 65% of the whole egg white. Because it contains about 0.3% fibrous mucin, it is sticky, while the inner and outer layers contain little such mucin.
Every 100g contains protein 10g, fat 0. 1g, carbohydrate 0/g, ash 0.6g19mg, phosphorus16mg, iron 0.3mg and riboflavin 0.26mg .. Lack of vitamins a and c; Thiamine 0.2 1.6 μ g/g, pantothenic acid < 1 μ g/g, p-aminobenzoic acid 0.055 μ g/g (dried egg white).
According to the ratio of water to solid, the water content is 87% and the solid is 13%. About 90% of the solids are protein, of which:
1 .ovalbumin 75%, ovomucin 15%, ovomucin 7% and associated albumin 3%.
2. Ovalbumin is a phosphorus-containing protein containing 1.7% mannose.
3. Oocyte contains 9.2% mixed sugar, which consists of 3 parts mannose and 1 part galactose.
4. Oocyte contains 14.9% mixed sugar, in which mannose and galactose are equal.
5. Associative albumin contains 2.8% mixed sugar, including 3 parts mannose and 1 part galactose.
6. Whole egg white also contains about 0.4% free glucose.
Egg mucin is a mixture containing lysozyme, protease inhibitor, egg mucin, egg glycoprotein and yolk protein.
Egg white contains less fat, but there are also traces of fat, lecithin, cholesterol and fat-soluble pigment lutein.
Egg white protein is nutritious because it contains all essential amino acids.
yolk
The yolk is the yellow part of the egg. The protein of an egg is concentrated in the egg white and the egg membrane, and the other nutrients are concentrated in the yolk. Egg yolk is rich in fat-soluble vitamins, monounsaturated fatty acids, phosphorus, iron and other trace elements.
Egg yolk is also a part of nutrients in eggs. The main minerals, vitamins and phospholipids in eggs are all in the yolk. The main components of egg yolk are 17.5% protein, 32.5% fat, about 48% water, 2% minerals and multivitamins.
efficacy
1. Replenish water
The skin problem caused by lack of water is not so simple as dryness. Almost every skin problem is related to hydration and maintenance.
Ingredients: 1 egg, honey, milk, flour.
Advantages: removing skin toxins, removing acne and replenishing water.
Practice: Beat the eggs into a bowl, only take the yolk, add honey, milk and flour, and mix well.
Usage: Apply it to face before going to bed at night, and wash it off with warm water after 20 minutes.
Efficacy analysis: Both honey and egg yolk can moisturize the skin. This self-made mask can supplement various nutrients of the skin and make the skin delicate and shiny. This hydrating mask is especially suitable for dry skin and winter or particularly dry areas.
Protect eyesight
Lutein and zeaxanthin are closely related to eye protection. Lutein and zeaxanthin have strong antioxidant effects, especially on eye protection.
Eggs are rich in protein, fat, yolk protein, lecithin, vitamins, iron, calcium, potassium, lutein, zeaxanthin and other minerals needed by human body. There is also high cholesterol in egg yolk, which is thought to increase blood lipids and lead to arteriosclerosis, so some people only eat egg whites instead of yellow.
But they don't know that egg yolk is rich in nutrients, and there are two kinds of nutrients in egg yolk that need special mention, that is lutein and zeaxanthin.
Deep yellow yolk is the source of lutein and zeaxanthin. More than 1/3 of the fat-soluble yellow substances in egg yolk come from these two components, which are easily absorbed by the human body. Therefore, for normal eggs, the yellower the yolk, the better for eye health.
Although people with coronary heart disease, hypertension, hyperlipidemia, high cholesterol and other diseases should not eat more eggs. But eating properly is no big deal. Experts suggest eating more fruits and vegetables while eating eggs, which can avoid high cholesterol and protect eyes.
Step 3 treat dysmenorrhea
Two eggs, motherwort 30g, rhizoma corydalis 15g are put into a casserole, and appropriate amount of water is added to boil. Eggs are cooked, shelled and boiled for a while, and then eaten with soup, which is a good food for dysmenorrhea patients.
Baidu Encyclopedia: protein
Meal Card Source: Baidu Encyclopedia: Egg Yolk
Autumn is coming, and the necessities of the little fairies have to be prepared again. Leather short skirts and long coats