Science News from research organizations Type 2 diabetes physically changes the human heart, study finds Type 2 diabetes quietly rewires the heart—draining its energy, stiffening its muscle, and pushing it closer to failure. Date: January 4, 2026 Source: University of Sydney Summary: Type 2 diabetes doesn’t just raise the risk of heart disease—it physically reshapes the heart itself. Researchers studying donated human hearts found that diabetes disrupts how heart cells produce energy, weakens the muscle’s structure, and triggers a buildup of stiff, fibrous tissue that makes it harder for the heart to pump.
