Recent classification of malnutrition-related diabetes as “Type 5 Diabetes” by the International Diabetes Federation represents a significant development in our understanding of diabetes aetiology, particularly for countries like Uganda where childhood malnutrition remains prevalent.
With 28.9% of Ugandan children fewer than five affected by stunting and widespread micronutrient deficiencies, the conditions that predispose to Type 5 diabetes are already established.
This emerging diabetes variant, distinct from both Type 1 and Type 2, presents with unique characteristics including high insulin requirements without ketosis and primarily affects individuals with low BMI.
Uganda’s dual burden of malnutrition and increasing diabetes prevalence creates a concerning scenario where today’s malnourished children may face elevated Type 5 diabetes risk in the coming years unless comprehensive interventions addressing both nutritional deficits and metabolic health are implemented.
The Recent Classification of Type 5 Diabetes
This classification represents a significant milestone in diabetes categorization, acknowledging a distinct diabetes phenotype that differs from the traditional Types 1 and 2. Type 5 diabetes was first described in Jamaica in 1955 and has been observed primarily in young men from low- and middle-income countries who have a body mass index below 19.
These patients are frequently misdiagnosed as having Type 1 diabetes, yet they do not develop ketonuria or ketosis despite having high blood glucose levels and requiring substantial insulin doses
The World Health Organization had previously recognized “malnutrition-related diabetes mellitus” as a distinct category in 1985 but later removed it in 1999 due to insufficient evidence linking malnutrition or protein deficiency to diabetes
Recent research, however, has provided stronger evidence supporting this classification, culminating in the 2025 consensus.
Malnutrition and Diabetes: The Ugandan Context
Uganda faces a complex interplay between diabetes and malnutrition. Research conducted in seven tertiary hospitals across Uganda revealed that approximately one-third of adult patients with recently diagnosed diabetes had normal body mass index
This lean diabetes phenotype was predominantly found in men and was associated with reduced insulin secretion by the pancreas. Researchers hypothesize that this reduced insulin secretory capacity could result from environmental factors like tropical infections and malnutrition before birth or during early childhood, or from genetic factors affecting pancreatic development and function
This finding demonstrates that the manifestation of diabetes in Uganda differs markedly from patterns observed in high-income countries, where insulin resistance and obesity typically predominate in Type 2 diabetes
The unique diabetes phenotype observed in Uganda shares characteristics with what is now classified as Type 5 diabetes, suggesting that malnutrition-related factors may already be influencing diabetes development in the country.
Current Nutritional Status of Ugandan Children
The nutritional landscape for Ugandan children presents several concerning trends. According to the Global Nutrition Report, 25.4% of children under 5 years are affected by stunting, while 3.6% experience wasting
More detailed assessments indicate national prevalence rates of 28.9% for stunting, 3.5% for wasting, and 3.7% for overweight among children under five
Micronutrient deficiencies are particularly widespread, with 28% of children under 5 deficient in Vitamin A and 64% suffering from iron-deficient anaemia
Other common deficiencies include zinc, calcium, and Vitamin B12, largely resulting from diets with low levels of animal product consumption
These nutritional deficits during critical developmental periods can have profound and lasting effects on metabolic health.
Future Risk for Ugandan Children
The convergence of childhood malnutrition and the emerging understanding of Type 5 diabetes creates a concerning outlook for Uganda’s children. The pathophysiological mechanisms underlying Type 5 diabetes suggest that early-life malnutrition may permanently alter pancreatic development and function, predisposing individuals to diabetes later in life even if their nutritional status improves
For Ugandan children currently experiencing stunting, wasting, or micronutrient deficiencies, the risk of developing Type 5 diabetes in adulthood may be substantially elevated. This represents a potential “diabetes time bomb” where the effects of current malnutrition may manifest as increased diabetes prevalence in the coming decades.
The situation is further complicated by Uganda’s changing food environment and dietary patterns. While undernutrition remains prevalent, there is a simultaneous emergence of overnutrition and processed food consumption in some populations
This nutrition transition could potentially amplify diabetes risk by introducing additional metabolic stressors to individuals whose pancreatic function may already be compromised by early malnutrition.
Therefore;
The recognition of Type 5 diabetes highlights the urgent need for integrated approaches to malnutrition and diabetes prevention in Uganda. Interventions must target both immediate nutritional needs and long-term metabolic health, particularly for children who represent the most vulnerable population.
Effective strategies should include strengthening maternal and child nutrition programs, enhancing micronutrient supplementation initiatives, promoting sustainable agriculture focused on nutrient-dense foods, and integrating diabetes awareness and prevention into existing healthcare frameworks.
The Writer, Daniel Kamara is a Clinical and Community Nutritionist at Bwindi Community Hospital in Kanungu District. Kamara is also a Board Member, Allied Nutritionists Association of Uganda
