Food is the top priority for the people. We have heard rumors about nutrition since childhood, such as "eating walnuts to nourish the brain" and "nutrition is all in soup". The reporter interviewed Ma Tenghui, deputy chief physician of the Nutrition and Microbiology Department of the Sixth Affiliated Hospital of Sun Yat sen University, and Zhang Lina, attending physician, to identify the "gold content" of these rumors. Is nutrition all in the soup? Wrong horse Tenghui: The soup in the soup is mainly composed of water and a small amount of water-soluble amino acids, with a low nutritional density. Therefore, it is best to eat the soup together with meat and side dishes. People with malnutrition or in need of supplementation should try to choose foods with high nutritional density. Is fish soup more nutritious when boiled until it turns white? Wrong Zhang Lina: Fish soup is not necessarily more nutritious as it becomes whiter. The white substance is actually fat, and after emulsification, the oil will turn white. The oil is continuously boiled, rolled, and mixed with water, and the more thoroughly mixed, the whiter it becomes. People with high blood lipids, hypertension, and high uric acid are advised to drink less of this soup. Eating walnuts will nourish the brain? To Zhang Lina: Walnut is a kind of nut food, rich in unsaturated fat acids such as fatty acid, oleic acid and linoleic acid. The phospholipids in walnuts have good health effects on the brain and nerves. Walnut oil contains unsaturated fat acid and has the effect of preventing arteriosclerosis. It is a healthy food suitable for all ages. Is skimmed milk healthier than whole milk? Wrong Ma Tenghui: Skimmed milk powder is made by removing fat from fresh milk and drying it. The fat content can be reduced to about 1%, which is relatively low compared to whole milk powder with a fat content of over 26%. It is more suitable for people with obesity, hyperlipidemia, and those who are not suitable for fat intake. But the problem is that with less fat, fat soluble vitamins dissolved in fat, such as vitamin A, vitamin E, vitamin D, and vitamin K, will also be lost. Fat itself also has certain nutritional value, providing energy and essential fatty acids. After removing fat, the proportion of carbohydrates that are not friendly to human health will also increase. So, from a nutritional perspective, whole milk powder has a more comprehensive nutritional composition, is suitable for a wider population, and has a better taste. Half life eggs are more nutritious? Wrong Zhang Lina: Half cooked eggs are difficult to digest and waste nutrients. The human body mainly relies on pepsin and trypsin in the small intestine to digest the protein in eggs, while the egg white in half cooked eggs contains anti trypsin and anti biotin protein, which can hinder the digestion and absorption of nutrients such as protein. Cooked eggs undergo high-temperature inactivation of anti trypsin and biotin proteins, enabling better digestion and absorption of proteins. In addition, approximately 10% of fresh eggs contain pathogenic Salmonella, mold, or parasitic eggs, and if the eggs are not fresh, the carrier rate is even higher. Is it better to supplement nutrition with health supplements? Wrong Zhang Lina: A reasonable diet for ordinary people can fully meet our body's nutritional needs. Health products generally focus on strengthening certain aspects, such as calcium supplements, vitamins, or proteins, but the nutrition is not comprehensive enough. Long term overdose of some health products may also lead to poisoning. However, for patients, especially those with incomplete gastrointestinal tract, low dietary intake, and fluid diet, enteral nutrition powder/liquid can be chosen. At this point, enteral nutrition powder/liquid is used as food to provide high-density nutrition