Type 2 Diabetes
Type 2 diabetes is what happens when the body stops responding to insulin and the pancreas can no longer compensate, so blood sugar drifts steadily upward over years. It develops quietly as muscle and liver grow resistant to insulin and the insulin-producing beta cells gradually wear out. Roughly one in ten adults now lives with it, and most cases trace back to a mix of inherited susceptibility and decades of energy surplus rather than any single cause. Left unchecked, persistently high glucose damages the small vessels of the eyes, kidneys, and nerves and roughly doubles the risk of heart disease. Yet it is among the most modifiable major chronic diseases, since substantial weight loss can push early disease into remission, which makes it a central test case for whether metabolic aging can be slowed rather than merely managed.
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