Stress and food: how they’re connected and what it means for your wellbeing

Have you ever noticed how your appetite changes when you’re under pressure? One day, you might crave chocolate or a greasy pizza for comfort, another, you can barely eat at all. That’s because stress and food are deeply connected, biologically, emotionally, and hormonally.

Prolonged stress can disrupt your nutrition, increase cravings, and alter your digestion, while a poor diet can actually raise stress hormones and fuel anxiety. But here’s the good news: with awareness and balanced eating habits, you can restore both calm and wellbeing.

The role of cortisol: the stress hormone

Cortisol, often called the “stress” hormone, is at the core of the stress and food connection. When you face a stressful trigger, your body releases cortisol to raise blood sugar and provide energy for quick action.

In ancient times, that meant running from danger. Today, the same hormone is released when you’re stuck in traffic, facing a deadline, or feeling overwhelmed. The body doesn’t know the difference, which is why modern anxiety feels so physical.

Everyone experiences a cortisol peak now and then, but when cortisol levels remain chronically elevated, this can affect your metabolism, mood, and digestion, influencing when, what, and how much you eat.

How our body reacts under stress

Your brain and body work together to help you deal with stress. They do this through a special “stress pathway”, known as the HPA axis (hypothalamic–pituitary–adrenal axis).

1. When your brain notices you’re stressed, the hypothalamus (a very important part of our brain) sends out a signal through a hormone called CRH (corticotropin-releasing hormone).
2. This signal tells another part of your brain — the pituitary gland (pea-sized part of the base of the brain) — to send a message to your adrenal glands (small glands on top of your kidneys) through another hormone called ACTH (adrenocorticotropic hormone).
3. The adrenal glands then release cortisol, a “stress hormone” that helps your body get ready to act.¹

When the stressful moment is over, this whole system is supposed to calm down so your body can return to its normal rhythm and daily functions, such as digesting food and recovering from exercise or illness. But if you’re stressed a lot of the time, cortisol can stay high. That can affect how hungry you feel, how your body stores fat, and perhaps even how quickly you recover from illness.²

Cortisol and metabolism

Your metabolism is the set of chemical processes that keep your body alive and working. It includes things like digesting food and giving your cells the energy they need. Thousands of tiny reactions are happening every second to make and use energy.

How cortisol fits in

Cortisol, a hormone released by your adrenal glands, helps control how your body uses glucose (sugar), fats, and proteins for energy, especially when you’re stressed.

When cortisol levels go up:

• It tells your liver to make and release more glucose into your blood. This gives your body a quick burst of energy to deal with stress.
• It also signals the pancreas to lower insulin and raise glucagon — two hormones that help manage blood sugar — so that extra glucose stays available for your muscles and brain.

In short, cortisol helps your body get fast energy when it thinks something stressful is happening.¹

Cortisol influences how muscle, liver, and adipose tissue (body fat) store and use energy. In the short term, this system helps maintain blood sugar balance and fuels the body’s fight-or-flight response.

What happens to your metabolism when cortisol stays high

Cortisol is helpful during short moments of stress, but when it stays high for a long time — called chronic stress — it can affect your metabolism.

If cortisol keeps telling your body to make more glucose (sugar) and your cells stop responding well to insulin (a hormone that helps move sugar into cells), things can backfire:

• Too much sugar can build up in your blood, a problem called hyperglycemia (high blood sugar).
• Your body may start storing more fat.
• Your metabolism can get out of balance and slow down.

Over time, this can raise the risk of health issues like type 2 diabetes, feeling tired more often, and trouble using energy efficiently.³ Chronic excess of cortisol can also cause high blood pressure and dysregulate the immune system.¹

How stress affects eating habits and appetite

Your eating habits often mirror your emotions. Stress can trigger two extremes: a loss of appetite or irresistible cravings for high-calorie foods.

Stress and loss of appetite

Acute stress, such as a sudden anxiety-inducing event, can suppress hunger. Your body diverts energy away from digestion toward coping mechanisms like alertness and quick reaction. This is why you may feel too tense to eat.⁴

Stress and cravings

Chronic stress does the opposite. It heightens appetite. Elevated cortisol stimulates cravings for sugary and fatty foods, quick comfort for the brain’s reward system. Eating these foods releases dopamine and serotonin, temporarily improving mood and relaxation.⁵

Over time, this emotional reward loop reinforces comfort eating as a stress response.

Food and nutrition habits to reduce stress

There are many simple habits that can help lower stress and improve your mood. They might feel difficult to start, especially when you are already feeling overwhelmed, but once they become part of your routine, managing stress often becomes much easier.

1. Plan balanced meals: Combine complex carbs, lean proteins, and healthy fats for sustained energy and mood balance.
2. Choose nourishing snacks: Fruits, yoghurt, nuts, and seeds satisfy cravings and provide essential vitamins and nutrients.
3. Stay hydrated: Water supports digestion, mental focus, and hormonal balance.
4. Eat regularly: Consistent meals regulate metabolism and prevent stress-related binge eating.
5. Cook and eat mindfully: The act of preparing food encourages relaxation and helps you reconnect with natural hunger cues.

Which foods help us feel calm?

The food you choose can calm or intensify stress. Nutrient-dense options like whole grains, vegetables, and omega-3-rich fish may support steady mood and lower cortisol.⁷ Refined sugar or processed snacks, on the other hand, cause blood-sugar spikes that increase anxiety and fatigue.

Eating a variety of nourishing foods can help the body manage stress and maintain emotional balance:

• Dark chocolate is rich in flavonoids that support the adrenal glands and may help calm stress responses.
• Whole grains provide fibre and plant nutrients that steady blood sugar levels and promote gut health.
• Fruits and vegetables supply antioxidants that protect cells and may ease the impact of stress hormones.
• Legumes and lentils offer slow-releasing energy and support healthy digestion.

• Green tea contains natural compounds such as L-theanine that encourage relaxation and focus.
• Probiotic and prebiotic foods, including yoghurt, kimchi and other fermented or high-fibre options, strengthen the gut and support mental wellbeing.
• Healthy fats from oily fish, nuts and seeds provide essential omega-3s that help regulate mood and brain function.
• Water is vital for concentration and can prevent cortisol levels from rising due to dehydration.⁸

The first step: slowing down

Modern life encourages eating quickly, at your desk, in the car, or while scrolling screens. This disconnects you from your body’s signals of hunger and fullness.

Taking time to eat slowly activates the parasympathetic nervous system, which promotes digestion, nutrient absorption, and a sense of calm. Practicing mindfulness while eating helps you recognise stress triggers and respond with awareness, not impulse. Simple mindfulness actions could include switching off the TV whilst eating, paying attention to how your food tastes and smells, or recognising when your stress is affecting how you eat. 

Building resilience through nutrition and mindfulness

The link between stress and food is complex, but understanding it empowers you to act with compassion instead of guilt. Stress might dull your appetite or drive you toward comfort eating, but mindful nutrition and balanced habits can restore resilience.

By nourishing your body, practicing mindfulness, and creating space for relaxation, you’re not only improving your health, you’re supporting emotional balance, stable mood, and long-term wellness. Caring for your body during times of stress is one of the most sustainable acts of self-care you can make.