When our body experiences stress, the brain sounds an emergency alarm and secretes the stress hormone cortisol through the hypothalamic-pituitary-adrenal axis. While cortisol supplies short-term energy to confront stress, problems emerge when it is secreted chronically. Cortisol stimulates appetite and acts as the prime culprit behind heightened cravings for foods high in sugar and fat. This occurs because such foods temporarily activate the brain's reward system, prompting the release of the pleasure chemical dopamine. A brain exhausted by stress easily succumbs to this dopamine temptation.
The explosive urge to eat specifically at night is also closely connected to this mechanism. At night, our body is supposed to secrete melatonin to induce sleep, increase the satiety hormone leptin, and decrease the orexigenic hormone ghrelin. However, when stress and irregular routines disrupt this hormonal balance, ghrelin remains elevated even at night, and leptin resistance develops, making it difficult to feel full despite having eaten. When cortisol is added on top of this, a vicious cycle of craving late-night snacks persists late into the night.
Emotional eating, which is reaching for food to soothe emotional emptiness rather than true hunger, is even more concerning. Sweet foods, in particular, cause blood glucose to surge rapidly, stimulating serotonin release and providing temporary pleasure; however, this is quickly followed by a sharp drop in blood glucose, trapping the body in a cycle of blood sugar spikes and insulin resistance that intensifies sweet cravings. Over the long term, this raises the risk of obesity, diabetes, and cardiovascular disease, while also overburdening the digestive system and potentially leading to chronic gastrointestinal distress or reflux esophagitis. We must remember that our brain and hormonal systems are profoundly sensitive to the emotional flame of fire.
