Proteins can be divided into animal protein (such as eggs, milk, and various meats) and plant protein (such as legumes and their products). Because the bioavailability of animal protein is higher than that of plant protein, it is also known as high-quality protein.
1. Dairy products and their by-products
Milk from livestock such as cow's milk, goat's milk, and mare's milk all contain a large amount of protein, with cow's milk having the highest protein content. Milk not only helps us supplement sufficient protein but is also rich in calcium. Regular consumption can effectively help prevent calcium deficiency.
It can be said that skim milk powder has the highest calcium content with almost no fat content. Therefore, milk made from skim milk powder is the best source of protein and calcium for adults to maintain a slim figure.
2. Meat products
The range of meats from livestock is very wide, including beef, mutton, pork, dog meat, chicken, duck, goose, quail, ostrich, etc. These meats all belong to the category of livestock meat. These meats contain the amino acids needed by the human body, and the types of these amino acids are most similar to those in animal protein. Therefore, the nutritional value of animal protein is higher than that of plant protein.
Moreover, among all animal proteins, the protein in milk and eggs is easy to digest, contains a complete range of amino acids, and is less likely to trigger gout attacks. Therefore, it can be said that its nutritional value is the best among all protein foods.
3. Egg products
When it comes to foods high in protein, egg products are among the best. Whether it's chicken eggs, duck eggs, or quail eggs, the protein content in the yolk is slightly higher than in the egg white. Although the protein content in the yolk is very high, a single yolk can contain up to 300 milligrams of cholesterol. Therefore, even people without heart disease should not eat egg yolks regularly. The cholesterol content of the egg white is 0, while the yolk contains a large amount of fat. In a normal yolk, you might not see the fat, but if you microwave a yolk, you will find that a large amount of oil is released. The fat in the yolk can also be seen in salted duck eggs.
Research has found that the calorie content in a yolk is 6 times that of the egg white, so the yolk is also considered a high-calorie food. Therefore, many people choose eggs as the best option for weight loss, as they not only provide nutrition but also help us achieve weight loss goals.
4. Soybean products and soy-based foods
Plant-based proteins are also foods high in protein, such as soybeans, green soybeans, and black beans, among which soybeans have the highest nutritional value. The best plant protein is soy protein, and it is also very easy for the human body to digest and absorb. Therefore, soy protein has always been the main source of protein for vegetarians. Research has also found that regular consumption of soy products can lower cholesterol and has anti-cancer effects. Moreover, soy protein is rich in isoflavones, a hormone-like compound that can inhibit the growth of tumor cells caused by hormonal imbalances.