Preventing childhood obesity in school meals: keys to a healthy childhood

A childhood obesity is no longer a problem isolated to a few families. Today it is a public health challenge worldwide. In 2021, the Ministry of Health estimated that 6.4 million Brazilian children were overweight and, among them, 3.1 million were already living with obesity.

Furthermore, in 2025, a UNICEF report pointed out that, globally, obesity has become the most common form of malnutrition among school-age children and adolescents, affecting 1 in 10.

In this scenario, the school plays a central role. Many children have their main meal of the day there, especially at school. public networks. Therefore, to think of lunch as the axis of preventing childhood obesity is a concrete strategy that involves menus, food education and management technology.

That's why, throughout this article, you'll understand how the school meals can preventing childhood obesity in public schools, what the main causes and consequences of this scenario are, and how management technology - including a school feeding system - supports nutritionists and managers in this mission.

Read on!

Childhood obesity in Brazil: why look closely at schools?

When we talk about childhood obesity in Brazil, we are dealing with a problem that is advancing rapidly and is already affecting the physical, emotional and academic development of millions of children. According to data from Ministry of Health, The prevalence of overweight and obesity among 5 to 9 year olds continues to rise steadily, reinforcing the need for urgent preventive action.

In addition, the Panorama of Obesity in Children and Adolescents, produced by the Instituto Desiderata, indicates that 31% of the children and adolescents monitored in SUS primary care were overweight in 2022. This figure shows the scale of the challenge faced by families and education networks.

In public schools, the school meals takes on an even more strategic role. In many municipalities, it represents a large part of children's daily food security. Therefore, what is served on the plate directly influences the progress or reduction of childhood obesity in public schools.

Leading organizations also reinforce this warning. According to Fiocruz, “healthy eating environments at school are key to curbing the upward trend in excess weight among children and adolescents”.

In this sense, investing in balanced menus, well-structured processes and continuous food education is indispensable for reversing the current scenario.

Causes and consequences of childhood obesity through the lens of school meals

Causes linked to the school environment

A childhood obesity has multiple causes. It involves genetics, family routine, access to leisure spaces, marketing of ultra-processed foods and emotional factors. However, the school environment can reinforce or mitigate these factors.

Among the points that contribute to weight gain in the school routine, we can highlight:

• Unattractive and unvaried menus that make children reject healthy preparations;
• Lack of alignment between the planned menu and what is actually produced and served;
• Presence of canteens and school surroundings with a large supply of ultra-processed foods;
• Lack of continuous food education actions integrated into the curriculum.

What's more, when there is no proper control of stock and purchases, last-minute improvisations can lead to higher-calorie preparations with excess sugar, fat and sodium.

Consequences that go beyond the scale

The causes and consequences of childhood obesity are not limited to the visual. Obese children have a higher risk of developing hypertension, type 2 diabetes, cholesterol changes and joint problems from an early age.

On the other hand, the emotional impacts are also profound. Bullying, isolation, a drop in self-esteem and worsening school performance appear frequently in research in the area.

Therefore, when the public school system discusses meals, it also discusses the physical and mental health and life trajectory of these children.

School meals as a strategy to prevent childhood obesity

The good news is that school meals can be a powerful ally in preventing childhood obesity. Instead of being seen only as a “cost” or an “obligation”, it becomes an educational and health tool.

Principles of a preventive school menu

One school menu which contributes to reducing childhood obesity, generally follows a few principles:

• Prioritizes fresh and minimally processed foods;
• Balances calorie density and nutritional density, offering quality satiety;
• It includes fruit and vegetables every day, in varied and visually appealing preparations;
• It adjusts portions according to the age group, avoiding both waste and excess.

In addition, the menu needs to respect guidelines such as the PNAE (National School Feeding Program), which guides the nutritional composition, the restriction of ultra-processed foods and the purchase of at least.., 30% of food from family farming.

Food education within the teaching routine

Various materials, such as the e-book organized by researchers from USP on the role of schools in combating childhood obesity, reinforce the importance of food education within the teaching routine.

In this sense, activities such as culinary workshops, guided tastings, school gardens and conversation circles help:

• Bringing children closer to fresh food;
• Dispelling myths about healthy eating;
• Involve teachers, families and kitchen staff in the same message.

Thus school meals It is no longer an isolated moment and becomes part of the institution's pedagogical project. Furthermore, when food education activities are ongoing, they create positive links with fresh food and strengthen children's relationship with healthier choices.

Public schools' challenges in preventing childhood obesity

Despite the potential of school meals, the public schools face significant challenges. Firstly, the budget is limited. In addition, the networks have to follow PNAE regulations, make tenders, deal with complex logistics and often manage hundreds of schools at the same time.

Among the most frequent problems are:

• Inaccurate consumption estimates, which lead to food shortages or surpluses;
• Failures in stock control, with risks of deviations and losses;
• Difficulty in adapting menus for different age groups and regional realities;
• Little visibility on the acceptance of the preparations by the students;
• Lack of integration between nutritionists, schools, secretariats and suppliers.

Meanwhile, the children continue to grow up, the scenario of childhood obesity in Brazil and managers need to make quick decisions, often without consolidated data.

This is why the discussion on preventing childhood obesity in public schools necessarily involves the professionalization of school meals management.

How technology helps prevent childhood obesity in school meals

In this context, technology is an ally. Specialized school feeding systems connect menu, purchasing, stock, production and distribution on a single platform, allowing prevention to move from talk to practice.

Teknisa, for example, developed the TecFood, a solution focused on the management of collective feeding, including school feeding, with resources for menu planning, stock control, financial management and integration with other systems.

Menu planning in line with the PNAE

With the school feeding system from Teknisa, In addition, managers can plan menus for different levels of education based on cost targets and the requirements of the PNAE.

In addition, the system makes it possible to standardize food factsheetss, record complete nutritional information and automatically check the macro and micronutrients of the preparations - such as carbohydrates, proteins, lipids, calcium and iron, among others.

The menu therefore becomes more balanced, precise and really suited to the children's needs.

To delve deeper into this topic and understand how standardization transforms the kitchen routine, you can download the e-book “7 benefits of the food technical data sheet”, which brings together practical guidelines that can be applied to day-to-day catering.

If you want to see in practice how the technical data sheet improves nutritional control and organizes production in kitchens, check out the video below.

Stock control and purchases to avoid calorie improvisations

Another critical point is stock control. When healthy foods are in short supply, many kitchens resort to less suitable substitutions.

That's why TecFood connect menu, purchasing, stock and production. In this way, the municipality monitors in real time what is coming in and what is going out, is able to plan purchases in advance and reduces the risk of improvisations that compromise the nutritional quality of the meals.

In addition Teknisa offers mobile applications, These allow inventories to be carried out directly in schools and production and distribution to be monitored even in places with poor connections.

Monitoring acceptance and constant adjustments

A preventing childhood obesity also depends on acceptance. There's no point in serving healthy dishes if they come back to the kitchen full.

That's why systems like TecFood from Teknisa, make it possible to record indicators of acceptance, leftovers and consumption per school. In this way, nutritionists can identify preparations with low uptake and adjust recipes, seasonings or presentation without losing nutritional balance.

In addition, consolidated dashboards help departments see consumption patterns, compare schools and set targets for improvement.

Integrated management for stronger public policies

When the menu, stock, purchases and acceptance are in the same system, mayors and secretaries have concrete evidence to formulate policies for preventing childhood obesity in public schools.

Consolidated reports support decisions on:

• Including more fruit and vegetables;
• Reduction of ultra-processed items in tenders;
• Food education campaigns;
• Training kitchen teams and school managers.

So technology is not a substitute for the nutrition team. On the contrary. It provides support so that the technical work has more impact.

Good practices for public schools that want to tackle childhood obesity

Although each municipality has its own reality, some good practices are repeated in the success stories.

These include:

• Create a working group on healthy eating, involving the secretariat, nutritionists, schools and social control.
• Integrating the nutritionist into annual educational planning, including food education projects.
• Standardize registration processes in a single system, such as the TecFood from Teknisa, which is a solution for school meals, connecting meals, purchases and stock.
• Encourage joint actions with families, such as guidance on lunchboxes and eating at home.
• Set simple, measurable goals, such as increasing fruit consumption and reducing the supply of sugary drinks.

In addition to these initiatives, other references can further strengthen the work of public schools. Official Ministry of Health, academic research and materials produced by universities help managers to broaden their repertoire and make evidence-based decisions.

In this way, public schools are able to build consistent projects that evolve over the course of the school year and dialogue with the students' nutritional reality.

Conclusion: school meals as the key to a healthier childhood

A childhood obesity is today one of the biggest public health challenges. In the world, it has already overtaken malnutrition as the most frequent form of malnutrition among children and adolescents.

In Brazil, the situation is also worrying. However, schools, especially public schools, have a transformative power. A school meals, when planned carefully, can be one of the main tools for preventing childhood obesity in Brazil.

To do this, you need to combine three pillars:

• Healthy menus in line with the guidelines of the PNAE;
• Food education integrated into everyday school life;
• Management technology, such as TecFood and Teknisa's solutions for school meals, This ensures that the planned menu becomes a balanced meal on each student's plate.

Thus preventing childhood obesity in school meals is no longer just an ideal, but a concrete strategy to ensure the right to a healthier, fairer and better-nourished childhood.

👉 Want to implement real improvements in school meals and reduce childhood obesity rates? Talk to Teknisa and see how our systems help nutritionists and managers turn data into results every day.