Type 5 Diabetes: The Urgent Need for Recognition of Malnutrition-Related Diabetes

 The Hidden Threat in Diabetes Care

Type 5 diabetes, newly recognized in 2025 by the International Diabetes Federation (IDF), represents a long-overlooked form of diabetes linked directly to malnutrition and chronic undernutrition, particularly in low- and middle-income countries. This milestone was announced at the World Diabetes Congress, with leading global experts citing equity, science, and lives at stake as they called for formal recognition and targeted care.

Why Type 5 Diabetes Matters Now

For over 70 years, malnutrition-related diabetes has affected millions without sufficient recognition, often misdiagnosed as type 1 or type 2 diabetes. Unlike classic diabetes types, type 5 diabetes is common among lean young adults and teenagers with a body mass index (BMI) below 18.5 kg/m². Its root cause is damage to pancreatic beta cells from long-term nutritional deprivation, starting often in the womb due to maternal malnutrition or early life food scarcity.

Key Findings from Recent Research

• Distinct Metabolic Profile: People with type 5 diabetes are insulin-deficient, not insulin-resistant, meaning they often can be treated with oral medications rather than insulin injections.

• Clinical Presentation: Hallmarks include persistent fatigue, weight loss, and susceptibility to infections; body scans reveal drastically reduced fat and muscle mass.

• Prevalence: The IDF estimates around 25 million cases worldwide, primarily concentrated in under-resourced regions facing widespread food insecurity.

Quoted in Medscape, Dr. Meredith Hawkins (Albert Einstein College of Medicine, USA) emphasized: “Malnutrition-related diabetes has historically been vastly underdiagnosed and poorly understood. The IDF’s recognition of it as ‘type 5 diabetes’ is an important step toward raising awareness of a health problem that is so devastating to so many people”.

Expert Opinions and Context

Professor Schwarz (IDF Working Group) stated at the World Diabetes Congress: “The recognition of type 5 diabetes marks a historic shift in how we approach diabetes globally. For too long, this condition has gone unrecognised, affecting millions and depriving them of adapted care. With the launch of the Type 5 Diabetes Working Group, we are taking decisive steps to correct this. This is about equity, science, and saving lives”.

Type 5 diabetes is commonly seen in men and women who were undernourished throughout their lives, especially in South Asia, sub-Saharan Africa, and marginalized communities worldwide. A 2022 WHO report highlights that over 200 million children under five in low-income countries suffer from stunting due to chronic malnutrition, placing them at risk for this condition.

Implications for Public Health

• Misdiagnosis and Inadequate Care: Until now, patients have often been treated as if they have type 1 diabetes, leading to unnecessary insulin injections and increased risk of hypoglycemia. Recognition will improve diagnostic accuracy and clinical management.

• Treatment Focus: Nutritional rehabilitation is central, especially protein-rich diets and micronutrient supplementation, alongside carefully tailored pharmaceutical regimens when needed.

• Policy Change: The establishment of formal diagnostic criteria and evidence-based treatment strategies by the IDF working group is expected to direct resources and training for healthcare professionals, especially in low-resource settings.

• Social Determinants: Addressing food insecurity and maternal nutrition is now seen as key to preventing and reducing rates of type 5 diabetes.

Counterarguments and Study Limitations

While the formal recognition of type 5 diabetes is a major step forward, not all experts are convinced by the proposed classification system, with some arguing that ambiguity remains regarding types 3 and 4 diabetes. There is also limited longitudinal data on the long-term outcomes of specific treatment regimens, making ongoing research essential. Experts call for multicenter studies to validate proposed protocols and adapt them for diverse populations.

Everyday Relevance and Practical Advice

For health-conscious consumers, the emergence of type 5 diabetes underscores the importance of balanced nutrition, particularly protein and micronutrients for growing children and teenagers. If caring for individuals with low BMI or persistent symptoms—especially in regions with widespread food insecurity—early screening and attention to nutritional status are now essential.

Healthcare professionals should revisit assumptions about diabetes diagnosis in undernourished patients and be aware that insulin resistance is not always present. Nutritional assessment and context-specific management may dramatically improve outcomes.

Conclusion

The global health community now faces the imperative to address both ends of the nutrition spectrum—over-nutrition fueling type 2 diabetes, and persistent undernutrition driving type 5 diabetes. Accurate classification and targeted care offer hope for millions previously neglected by traditional diabetes paradigms. As standardized protocols emerge, ongoing advocacy by experts, patients, and policymakers will be vital to closing the gap in diabetes care worldwide.

Medical Disclaimer

Medical Disclaimer: This article is for informational purposes only and should not be considered medical advice. Always consult with qualified healthcare professionals before making any health-related decisions or changes to your treatment plan. The information presented here is based on current research and expert opinions, which may evolve as new evidence emerges.

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