Cortisol Explained: Is the Stress Hormone Actually Bad for You?

These patterns do not diagnose high cortisol on their own, but they may suggest that the body’s stress response has been activated for longer than intended. To understand why this happens, it is helpful for us to look at how the body normally responds to stress.

What Causes High Cortisol?

Your body is built to react quickly to immediate threats. You might be familiar with the ‘fight-or-flight’ response, the body’s acute stress reaction.

During acute stress, the brain activates the hypothalamic–pituitary–adrenal (HPA) axis, leading to increased cortisol release (2).

You may experience your heart rate accelerating, faster breathing, and muscles preparing for action. Your liver also releases glucose (sugar) to provide quick energy, helping your body respond to the perceived threat.

In the short term, this can be useful.

The challenge is that modern stressors, such as deadlines, traffic, work pressure, disrupted sleep, late-night screen exposure, irregular meals, high caffeine intake, and constant notifications, may not be life-threatening, but they still activate the same stress pathways.

Over time, this sustained activation, often referred to as chronic stress, can affect how the stress system functions and disrupt cortisol’s natural daily rhythm (3). Instead of rising in the morning and gradually declining toward evening, the pattern may become less predictable.

Cortisol Belly and Cortisol Face: Are They Real?

In the UK, chronic stress is increasingly common. One in three adults reported experiencing high or extreme stress ‘often’ or ‘always’ last year (4).

Stress hormones help release glucose into the bloodstream to provide quick energy when it’s needed. Unlike our ancestors, though, we rarely run away from the ‘threat’. Over time, and alongside other risk factors, this pattern may contribute to less stable blood sugar control in some individuals (5).

So, does cortisol cause belly fat? Not exactly. The term ‘cortisol belly’ is often used online to describe weight gain around the stomach that people associate with chronic stress. Cortisol itself isn’t a direct trigger for abdominal fat gain. But chronic stress can influence appetite, cravings, sleep quality and blood sugar control. Over the longer term, that combination may make visceral fat gain more likely in some people, which is why the idea of ‘cortisol belly’ has taken off online.

What about ‘cortisol face’? This term is often used on social media to describe a puffier-looking face. There’s currently limited research supporting it as a defined medical condition. That said, stress can influence fluid balance and inflammatory pathways, which may contribute to temporary puffiness in some individuals. More pronounced facial swelling, sometimes called ‘moon face’, is typically linked to medical conditions involving excessive cortisol production (such as Cushing’s syndrome), rather than everyday stress (1).

How to Reduce Cortisol Naturally

If you’re wondering how to lower cortisol naturally, the goal isn’t to eliminate cortisol, but to support the systems that regulate the body’s stress response. 

Here are a few tips that can help you manage stress more effectively:

1. Reduce Stressors

Sometimes emotional stressors are unavoidable. However, other stressors such as poor sleep, under-eating, excessive caffeine intake, and large swings in blood sugar can also activate the stress response. Keeping blood sugar more stable can help reduce unnecessary physical stress on the body. 

To support this, aim for regular, balanced meals that include a source of protein, fibre and healthy fats. These can help you maintain steadier energy levels and reduce unnecessary stress signalling.

2.  Support Circadian Rhythm

Cortisol follows a circadian rhythm. Disruption to sleep timing, late-night light exposure and irregular schedules can affect this pattern (1).

Morning daylight exposure, consistent sleep timing and limiting screen time late in the evening may help support normal cortisol rhythm.

3.  Mindfulness

Mindfulness practices can help support relaxation, helping your body come out of ‘fight-or-flight’ and back into a calmer ‘rest-and-digest’ mode. This does not necessarily mean formal meditation. Instead, it can be anything that helps you to switch off.

Activities such as walking in nature, attending a yoga class, chatting to a friend, journalling, reading, or simply taking time away from screens can all support stress management (11). 

4. Gut–Brain Axis

Emerging research suggests the gut microbiome may influence how the body responds to stress through the gut-brain axis. The gut and brain are in constant two-way communication, and this may influence how the body regulates stress (6).

Supporting gut health through fibre-rich foods, plant diversity and fermented foods may contribute to healthier cortisol levels over time.

5.  Nutrients That Support the Stress Response

Certain nutrients play an important role in supporting the body’s response to stress: