1. Walnut, also known as walnut or walnut, is a plant of the Juglandaceae family.

Together with almonds, cashews and hazelnuts, they are known as the world-famous "four major dried fruits".

Walnut kernels are rich in nutrients, containing 15 to 20 grams of protein per 100 grams, more fat, and 10 grams of carbohydrates; and contain various trace elements and minerals such as calcium, phosphorus, and iron necessary for the human body, as well as carotene, nuclear

Flavin and other vitamins.

Beneficial to human body.

It is one of the nut foods loved by the people.

2. Milk, milk is rich in minerals, calcium, phosphorus, iron, zinc, copper, manganese, and molybdenum.

The most rare thing is that milk is the best source of calcium for the human body, and the ratio of calcium to phosphorus is very appropriate, which is conducive to the absorption of calcium.

The types are complex, with at least more than 100 kinds. The main ingredients include water, fat, phospholipids, protein, lactose, inorganic salts, etc.

3. Soybeans. Soybean meal is the residual by-product of soybean oil extracted by low-temperature (40-60°C) extraction method. It is in the form of coarse powder.

Since soybeans are not exposed to temperature, the antitrypsin, urease, hemagglutinin, and goiter-inducing factors of soybeans will not be destroyed.

Soybean meal is the most widely used and consumed plant-based protein raw material.

4. Eggs, the structures of various poultry eggs are very similar.

It is mainly composed of three parts: egg shell, egg white and egg yolk.

Taking eggs as an example, each egg weighs about 50g± on average, and the eggshell weight accounts for 11% of the total. Its main component is 96% calcium carbonate, and the rest is magnesium carbonate and protein.

The surface of the eggshell is covered with cuticles with a diameter of about 15 to 65 μm, and the cuticles are separated into an air chamber at the blunt end of the egg.

5. Meat.

Meat also contains more vitamins B1, B2, niacin, etc. For example, pork (fat and lean) contains 0.53 mg of vitamin B1, 0.12 mg of B2, and 4.2 mg of niacin per 100 grams.

The content of organs is higher, especially the liver. Each 100 grams of pork liver contains about 2.11 mg of vitamin B2, which is 15-20 times more than that of muscle. The niacin content is 16.2 mg, which is 4-5 times more than that of muscle.

Extended information: The amino group of one amino acid and the carboxyl group of another amino acid can be condensed into a peptide, and the amide group formed is called a peptide bond in protein chemistry.

Amino acids are the smallest molecules and proteins are the largest. Two or more amino acids are dehydrated and condensed to form several peptide bonds to form a peptide. Multiple peptides undergo multi-level folding to form a protein molecule.

Proteins are sometimes called "polypeptides."

Dipeptide (dipeptide for short) is a protein fragment composed of two amino acids.

Baidu Encyclopedia - Peptides