type 2 diabetes

Imagine the insulin key still fits, but over years of overuse the locks on the cells have grown worn and sluggish. The pancreas compensates by churning out more and more insulin to force the doors open, but eventually the overworked beta cells tire out and can no longer keep up. Blood sugar then drifts upward — the slow, often silent onset of type 2 diabetes.

Type 2 diabetes results from the combination of insulin resistance (tissues respond poorly to insulin) and progressive beta-cell dysfunction (the pancreas cannot secrete enough to overcome that resistance). It is strongly linked to excess body fat, physical inactivity, aging, and genetic susceptibility, and accounts for about 90% of all diabetes. Unlike type 1, insulin is present — sometimes even in excess early on — but its effect is blunted.

Onset is usually gradual and may go undetected for years, during which complications can quietly begin. Management starts with lifestyle measures and oral or injectable agents such as metformin, GLP-1 receptor agonists, and SGLT2 inhibitors; insulin may be added later as beta-cell function declines. Importantly, substantial weight loss can drive type 2 diabetes into remission, underscoring that it is often, though not always, modifiable.