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Welcome back to the IUNS 80th anniversary series, “Nutrition Without Borders: 80 Years of IUNS”.
From Scarcity to Complexity: Global Nutrition Challenges Over 80 Years
When IUNS was founded in 1946, global nutrition challenges were largely defined by scarcity: widespread deficiencies of vitamins, minerals, and protein affected millions. Today, the picture is more complex. While deficiencies remain in some regions, many countries now face the double burden of malnutrition — undernutrition alongside overweight, obesity, micronutrient deficiencies, and diet-related chronic diseases. Climate change, urbanisation, and global food systems have added new layers of complexity. Understanding how these challenges have evolved illuminates why international scientific collaboration has never been more critical.
In the post-war period, nutrition science was still young and rapidly developing. The discovery and isolation of vitamins was ongoing, our understanding of deficiency diseases were being scientifically explained. This emerging scientific field was being being applied directly on the major health problems of the day. The focus was on preventing and correcting deficiencies. Vitamin A, iodine, iron, and protein-energy malnutrition were the primary concerns. National governments and international agencies worked to improve food supply, fortify staples, and educate communities. This work saved lives and laid the foundation for modern public health nutrition.
Over time, as food availability increased and lifestyles changed, new challenges emerged. Nutrition science itself continued to expand rapidly, moving beyond individual nutrient identification to understanding more about the complex relationships between diet andlong-term health. Obesity, diabetes, cardiovascular disease, and diet-related cancersbecame pressing public health concerns, even in countries still grappling with undernutrition. At the same time, awareness of food system sustainability, environmental impact, and cultural dietary patterns added further layers of complexity to nutrition science.
IUNS’s Evolving Role
IUNS adapted to these shifting challenges by expanding its scientific scope and convening experts to tackle emerging issues. Task forces, international conferences, and collaborative research projects addressed both deficiency diseases and chronic conditions. The union emphasised capacity building, equity, and knowledge sharing, ensuring that scientists in low- and middle-income countries (LMICs) could participatefully in global nutrition research.
By comparing “then and now,” it is clear that nutrition challenges have transformed from problems of scarcity to problems of complexity, requiring integrated, interdisciplinary approaches and international cooperation.
The evolution of nutrition challenges underscores why organisations like IUNS remain essential. What began as a mission to address post-war deficiencies has grown into a global platform tackling multifaceted problems, from obesity to climate-sensitive food systems. By convening scientists and fostering collaboration, IUNS helps the global community respond to both old and new nutrition challenges, which remains true to its vision of improving human health worldwide.
Source: https://iuns.org/2026/05/nutrition-with ... e-changed/
