Which factor primarily causes Type 2 diabetes?

Type 2 diabetes primarily develops as a result of a bad diet over time. This condition is characterized by the body's inability to effectively use insulin, leading to elevated blood glucose levels. A poor diet rich in processed foods, sugars, and unhealthy fats can contribute significantly to obesity, which is a major risk factor for Type 2 diabetes. Over time, the consumption of high-calorie, low-nutrient foods can lead to insulin resistance, where the body's cells become less sensitive to insulin's effects, causing the pancreas to produce more insulin to manage blood sugar levels. When these excessive demands on insulin production continue, it can eventually lead to the development of Type 2 diabetes.

While genetic predisposition can influence the risk of developing Type 2 diabetes, lifestyle factors such as diet and physical activity play a much more critical role in its onset. An autoimmune reaction is associated with Type 1 diabetes rather than Type 2. Additionally, lack of physical activity does contribute to the risk of diabetes, but it tends to be more effective in combination with dietary choices. Overall, the impact of a poor diet over an extended period is more direct in leading to the metabolic changes associated with Type 2 diabetes.