Losing weight is a proven way to manage both type 2 diabetes (T2D) and obesity, yet many people with diabetes struggle to shed pounds — even when using weight-loss medications like semaglutide or tirzepatide. Research shows that individuals with T2D often lose less weight than those without diabetes, and several biological and clinical factors help explain why.
1. High Insulin Levels Promote Fat Storage
In T2D, the body produces excess insulin (hyperinsulinemia) due to insulin resistance. This high insulin level encourages fat storage, particularly visceral fat, which worsens both weight gain and insulin resistance.
2. Less Energy Loss Through Urine
As blood sugar levels normalize with treatment, less glucose is lost through urine (a process called glucosuria), meaning fewer calories are expelled, making weight loss harder to sustain.
3. Some Diabetes Medications Cause Weight Gain
Medications like insulin, sulfonylureas, and pioglitazone can lead to weight gain through increased insulin levels or fluid retention. For example:
- Insulin therapy may lead to 1–3 kg weight gain.
- Sulfonylureas can cause 1–3 kg weight gain.
- Pioglitazone may increase weight by around 2 kg.
4. Fear of Low Blood Sugar Boosts Calorie Intake
Many patients eat more—especially carbohydrates—to prevent or respond to hypoglycemia (low blood sugar), a common side effect of several diabetes medications. This protective eating adds extra calories and hinders weight loss.
5. Physical Activity Is Often Limited
Diabetes-related complications like neuropathy, foot ulcers, or heart and kidney disease can reduce a person’s ability to exercise regularly — a major barrier to effective weight loss.
Conclusion:
Weight management in type 2 diabetes is complex and influenced by both physiological mechanisms and treatment-related factors. Understanding these barriers is key to providing better, individualized care and improving outcomes in people living with T2D.
