Cortisol is the stress hormone. It is released when the anterior pituitary gland sends adrenocorticotropic hormone to the zona fasciculata – the middle layer of the adrenal cortex. This layer produces cortisol, which can be helpful in the short term. It breaks down protein and fat, as well as increasing blood sugar for energy.
But chronic stress is a problem, as high blood sugar can lead to weight gain and diabetes, and the other effects of cortisol are damaging when experienced chronically
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