Stress is simply this: the response of your body and mind to challenging situations that you feel you cannot cope with. This response turns into a reaction through hormones, nerves, and body systems.
And this reaction — especially when it lasts for a long time — can push our eating habits outside the “normal” range. Reaching for chocolate or pizza, or on the contrary, not being able to eat anything at all, can be part of this. But why?
The Hormonal Game Begins
When a stressful situation occurs, your body goes into “alarm mode”: the heart rate increases, blood pressure rises, and adrenal hormones, especially cortisol, come into play. (PMC)
These hormones do not only put you into “fight or flight” mode; they also affect appetite. In the short term, for example during a very intense moment of stress, appetite may decrease. But when a person is exposed to work stress, relationship problems, or constant pressure, the process can move in another direction: high cortisol levels, increased hunger, and a tendency toward foods high in sugar and fat. (Harvard Health)
The Brain, Nerves, and Gut Are Involved
There is a system called the vagus nerve, which works like a “phone line” between the brain and the gut/digestive system. Stress can affect this line, and the signals may become mixed. As a result, signals such as “fullness” and “hunger” may not arrive correctly.
Scientific studies show that stress hormones can disrupt appetite, food choices, and the feeling of fullness after eating. (Frontiers)
Long-Term Stress Creates an Extra Problem
When stress continues for a while — in other words, when it becomes chronic — the tendency is not only to “eat more,” but also to “eat poorer-quality foods.” Foods high in sugar and fat that feel “comforting” become more appealing. Scientific research associates this with hormones such as cortisol and insulin. (PMC)
For example, high cortisol levels have been shown to reduce insulin sensitivity, which may disrupt blood sugar regulation. (OUP Academic) In this case, the body may switch to a “I need sugar as fuel” signal, and we may experience this as an urge to keep eating without feeling satisfied.
What Can We Do?
If we do not want to enter the stress-eating cycle, gain weight, or feel bad about ourselves, there are a few practical steps:
If you expect intense stress, such as work pressure or an exam period, plan ahead: keep healthy snacks available and move junk foods away from places you can easily reach.
Pay attention to sleep: Getting enough sleep supports your hormonal balance and may reduce the transformation of stress into the “desire to eat.”
Move your body: Exercise is important not only for burning calories, but also for lowering stress hormones and supporting eating control.
Move forward without blaming yourself: If you say, “I will calm my stress with a slice of pizza,” even noticing this and asking, “What do I need? Am I really hungry, or is stress guiding me?” is a big step.
Control accessible foods: Packaged foods high in sugar and fat become an “easy choice” under stress. Making them relatively harder to reach, for example by placing them on another shelf, may reduce automatic tendencies.
Brief Summary
When we are stressed, not only our mood but also our hormones and nervous system become activated. This change can increase appetite, make us turn to poorer food choices, and pave the way for health problems such as insulin resistance in the long term. But this cycle can be broken with sleep, movement, awareness, and conscious food choices.
You can review the content on obesity and depression.
References
Chao AM, et al. “Stress, cortisol, and other appetite-related hormones.” PMC. 2017. (PMC)
Wijnant K, et al. “Stress Responsiveness and Emotional Eating Depend on…” PMC. 2021. (PMC)
Adam TC, Epel ES. “Stress, eating and the reward system.” Physiology & Behavior. 2007. (ScienceDirect)
Sominsky L, et al. “Eating behaviour and stress: a pathway to obesity.” Frontiers in Psychology. 2014. (Frontiers)
Kuckuck S. “Glucocorticoids, stress and eating: The mediating role of…” Obesity Reviews. 2023. (Wiley Online Library)
Adam TC, et al. “Cortisol Is Negatively Associated with Insulin Sensitivity…” The Journal of Clinical Endocrinology & Metabolism. 2010. (OUP Academic)
Ha O-R, Lim S-L. “The role of emotion in eating behavior and decisions.” Frontiers in Psychology. 2023. (Frontiers)
