How much food does a normal person eat in a day

A normal and regular life usually ensures three meals a day with fixed meal times every day, and the meal times of each meal should be controlled at the same time as much as possible. You should try to eat more at breakfast, eat more nutritiously at noon, and if conditions permit, you can combine meat and vegetables. You can eat a little less at night. So how much food should a normal person eat in a day?

People need to eat three meals a day. They eat not only to fill their stomachs or satisfy their cravings, but mainly to ensure the normal development and health of the body. Experiments have shown that the protein digestion and absorption rate of food is 85% for three meals a day. If it is changed to two meals a day, and each meal contains half of the total food intake for the day, the protein digestion and absorption rate will be only 75%. Therefore, according to the living habits of the Chinese people, generally speaking, three meals a day are more reasonable. At the same time, it should be noted that the interval between meals should be appropriate. If the interval is too long, it will cause a high sense of hunger and affect people's labor and work efficiency. If the interval is too short, the previous meal has not been emptied in the stomach, and the next meal is eaten immediately, the digestive organs will not get proper rest, the digestive function will gradually decrease, affecting appetite and digestion. Generally, mixed food stays in the stomach for about 4 to 5 hours. A 4 to 5-hour interval between two meals is more appropriate, and 5 to 6 hours is basically in line with the requirements.

Biological clock and three meals a day: Modern research has shown that the digestive enzymes in the human body are particularly active in the morning, noon and evening, which shows that when a person eats is controlled by the biological clock.

Brain and three meals a day: The human brain accounts for a large proportion of the body's daily energy consumption, and the brain can only be supplied with glucose, which requires about 110 to 145 grams per day. The liver can only provide about 50 grams of glucose from each meal. Three meals a day, the liver can provide enough glucose to the human brain.

Digestive organs and three meals a day: It takes about 30 to 60 seconds for solid food to go from the esophagus to the stomach, and stays in the stomach for 4 hours before reaching the small intestine. Therefore, a 4-5 hour interval between three meals a day is reasonable from the perspective of digestion.

Food selection for three meals a day: What food to choose, how to prepare it, and what method to use to cook it are all very particular and vary from person to person. Generally speaking, the staple food and side dishes for three meals a day should be a combination of coarse and fine foods, and there should be a certain proportion of animal food and plant food. It is best to eat some beans, potatoes and fresh vegetables every day. The scientific distribution of three meals a day is determined according to each person's physiological condition and work needs. According to the distribution of food intake, the ratio of breakfast, lunch and dinner is 3:4:3. If someone eats 500 grams of staple food every day, then he should eat 150 grams each in the morning and evening, and 200 grams at noon is more appropriate.

Scientific combination of breakfast:

Nutrition experts believe that breakfast is the most important meal of the day and eating a good breakfast every day can make people live longer. Eating a good breakfast means eating small but fine foods with high nutritional value. After a night of sleep, the nutrients consumed the night before have been basically consumed. Only by replenishing nutrients in time in the morning can the needs of work, labor and study in the morning be met. Breakfast should be designed to mainly consist of foods that are easily digestible, absorbable and high in fiber. It is best if the proportion of raw food is as high as possible, as this will become the main source of energy for the day.

◎The importance of breakfast: Experts have found through long-term observation that if a person does not eat breakfast after getting up in the morning, the blood viscosity will increase and the flow will slow down. Over time, it will lead to a heart attack. Therefore, a hearty breakfast not only makes people energetic during a day's work, but also benefits the health of the heart. Teenagers who insist on eating breakfast grow stronger and have stronger disease resistance than those who do not eat breakfast. They perform better in school and class. They are more focused during lectures, have stronger comprehension abilities, and generally have better academic performance. For the working class, eating a good breakfast is also the guarantee for doing basic work well. This is because human brain cells can only obtain energy from the nutrient glucose. After a night without eating and skipping breakfast, the blood cannot guarantee sufficient supply of glucose. Over time, people will become tired and weak, and even experience nausea, vomiting, dizziness and other phenomena, and will not be able to devote themselves to work with full energy.