Stress Hormones Explain How Obesity Causes Diabetes

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Scientists have long thought obesity causes diabetes by impairing the way insulin signals within liver and fat cells. However, the new research shows that overeating and obesity increase the body's sympathetic nervous system – the "fight or flight" response – and that the increased level of the stress hormones norepinephrine and epinephrine counteract insulin's effects even though cellular insulin signaling still works.

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