Diabetes Caused by Hunger, Not Sugar: Why Scientists Recognized Type 5 Diabetes and Why It Is Dangerous

The International Diabetes Federation (IDF) has classified Type 5 diabetes as an independent medical condition—a distinct form of the disease that stems from severe, chronic malnutrition during childhood and adolescence. According to preliminary epidemiological estimates, the pathology may affect 20 to 25 million people worldwide, primarily across Sub-Saharan Africa, South Asia, and Southeast Asia.

Official recognition is critical for clinical practice: for decades, patients with this condition were treated under standard protocols, often triggering fatal complications.

While clinicians have long been aware of the condition, scientific consensus has emerged only recently. The World Health Organization included “malnutrition-related diabetes” in its classifications back in 1985, only to drop it in 1999 due to insufficient evidence. Large-scale molecular research finally settled the debate: biologists writing in Diabetes Care confirmed that malnourished patients exhibit unique metabolic markers that do not fit any conventional diagnosis.

How It Differs Biologically from Types 1 and 2

The fundamental distinction lies in how the body produces and responds to insulin:

• Type 1 diabetes: The immune system attacks pancreatic cells, wiping out the body’s ability to produce insulin altogether;
• Type 2 diabetes: The body produces sufficient insulin (especially in the early stages), but tissues lose sensitivity to it through insulin resistance;
• Type 5 diabetes: Cells retain normal insulin sensitivity, but the pancreas physically cannot produce enough of the hormone.

As IDF experts explain, prolonged deficits of protein and micronutrients in early childhood severely impair the development of pancreatic islets of Langerhans. A typical patient is an adolescent or young adult with an extremely low body mass index (often below 18.5) who shows no genetic markers of autoimmune cell destruction.

The Deadly Trap of Misdiagnosis

The primary danger for these patients has been diagnostic confusion. When doctors treated them for Type 2 diabetes, standard blood-sugar-lowering drugs like metformin proved ineffective because they target insulin resistance, which these patients do not have.

Conversely, mistaking the condition for Type 1 diabetes and prescribing standard high doses of insulin turned lethal. Combined with irregular nutrition and a lack of continuous glucose monitoring, high insulin sensitivity triggered severe hypoglycemia—a steep drop in blood glucose that can cause comas and irreversible brain damage.

To establish safe treatment regimens, the IDF established an international working group led by Professor Meredith Hawkins. Clinicians are tasked with designing gentler protocols using microdoses of insulin secretagogues paired with clinical nutritional support. Meanwhile, patients in developed nations will not need their diagnoses re-evaluated: Type 5 is strictly linked to early wasting malnutrition and is virtually nonexistent in affluent regions.