Junior High School Lunch: A Scientific Perspective on an Important Meal Physiological Foundations A lunch for a child aged 7–10 years is a critically important meal from a physiological and neurobiological standpoint. By the middle of the school day, glycogen reserves (the main source of energy for the brain) are depleted, and blood glucose levels drop, which directly affects cognitive functions: attention, memory, and information processing speed. Scientific research, including studies by the Institute of Age Physiology of the Russian Academy of Education, shows that children who receive a full hot lunch have working memory scores 15–20% higher in the second half of the day than those who are limited to a snack. Interesting fact: The stomach of a junior school student has a volume of only 400–500 ml, which is roughly equal to a standard water bottle. However, its evacuation function (the speed of food passing into the intestines) is accelerated. Therefore, lunch should be sufficiently caloric (about 25–30% of the daily norm, i.e., 500–700 kcal), but not creating a feeling of heaviness. It is here that a scientifically-based combination of products comes to the rescue. Architecture of the Ideal Lunch: A Nutritional Approach According to modern recommendations of the World Health Organization and national standards (SanPin 2.4.5.2409-08), the structure of lunch is built on the principle of a "healthy plate". The first course (soup) is not just a tradition, but a physiological "liquid preparation" of the digestive tract. Warm broth or soup stimulates the secretion of gastric juice, preparing the stomach for the intake of denser food. Research shows that children who regularly consume soups suffer from constipation less often and have a more stable gastric acid environment. An important nuance: soups on strong meat broths are not recommended more than 1–2 times a week due to high extractiveness, preference is given to vegetable, grain, or light meat (second cooking) op ... Read more