Hello, the answer is yes-yes. Oil contains a lot of unsaturated fatty acids. Even if you don't eat cooking oil, it doesn't mean you don't eat fat! People need to eat oil, especially the growing teenagers. If you don't eat oil for a long time, it will lead to dry skin, desquamation, brittle hair and easy shedding, which will affect your physical development. The oil we eat is vegetable oil and animal fat. Linoleic acid, linolenic acid and arachidonic acid contained in vegetable oils such as peanut oil, soybean oil, rapeseed oil, sunflower oil and sesame oil are all important unsaturated fatty acids necessary for human body. These organic acids cannot be synthesized in human body and can only be absorbed from edible oil. These unsaturated fatty acids have low melting point and easy absorption, and have the functions of lowering cholesterol and preventing atherosclerosis. The chemical composition of animal fat is mainly saturated fatty acid glyceride. Each gram of fat can produce 9 kilocalories in human body, which is twice as much as the same mass of carbohydrates or protein. If animals eat too much fat, it will be transformed into adipose tissue and stored in the body, which will gradually make the body fat, increase the cholesterol in the blood and accelerate the hardening of the blood vessel wall, leading to hypertension, coronary heart disease and unexpected diseases such as heart, brain and kidney. Therefore, it is better for the elderly to eat vegetable oil. Children and teenagers' bodies are developing, moving more and consuming more energy. After the edible oil is digested and absorbed in the body, some provide energy for physical activities, while others form cell tissues. Oil contains cephalin, which is an indispensable nutrient for the normal growth and development of teenagers, so teenagers need vegetable oil and animal fat very much. Salt is more important. Adjust the balanced distribution of water in human body, maintain osmotic pressure inside and outside cells, participate in the formation of gastric acid, promote the secretion of digestive juice, and stimulate appetite. At the same time, it also ensures the pH necessary for the action of pepsin, maintains the balance of pH in the body and the normal circulation of body fluids. People cannot live without salt. Eating too little salt can also lead to low sodium content in the body, loss of appetite, weakness of limbs and dizziness. In severe cases, there will be anorexia, nausea, vomiting, increased heart rate, weak pulse, muscle spasm, blurred vision, weakened reflex and other symptoms. However, eating too much salt is also harmful to the human body. The results of scientists' research show that salt can "replenish water" to the human body, that is to say, salt has a certain adsorption force on water. If there is more salt in the human body, it is necessary to increase the water accordingly, so that too much water stays in the body, thus causing high blood pressure. Someone has investigated the eating habits of residents in northern Tokyo, Japan. They eat an average of 25 grams of salt every day, and people with hypertension account for 30 ~ 40% of all residents. In other parts of the world, people only eat 5 ~ 15g of salt every day, and only 8 ~ 10% of them suffer from hypertension. Eskimos living in the Arctic Circle eat less than 5 grams of salt every day, and almost no one suffers from high blood pressure. Therefore, experts suggest that adults should not eat more than12g of salt every day.