Why Stress Affects Digestion

Have you ever noticed your digestion changes when you’re stressed or feeling anxious?

You might experience:

• Bloating
• Digestive discomfort
• Changes in appetite
• Increased sensitivity to certain foods

This isn’t random, it’s all linked to the gut–brain axis, a connection between your brain and digestive system.

What Is the Gut-Brain Axis?

The gut-brain axis refers to the two-way communication between your brain and your gut.

This connection involves:

• The nervous system (including the vagus nerve)
• Hormonal signalling
• The gut microbiome

Research shows that this system plays a key role in both digestive function and emotional wellbeing (Cryan et al., 2019; Mayer, 2011).

As this is a two-way communication system, your brain can influence your gut, and your gut in turn can influence how you feel.

How Stress Affects Digestion

When you experience stress, your body activates the “fight or flight” response. Stress begins in the amygdala (a part of the brain), which is responsible for detecting threats and triggering an emotional response.

When the amygdala perceives a stressor, it sends signals to the hypothalamus, the body’s control centre for maintaining homeostasis (balance).

The hypothalamus then communicates with the pituitary gland, which releases a cascade of hormones to prepare the body for action.

The Hypothalamic-Pituitary-Adrenal (HPA) Axis

The hypothalamus activates the HPA axis, which involves the interaction between the hypothalamus, the pituitary gland, and the adrenal glands.

The adrenal glands, located on top of your kidneys, release stress hormones such as adrenaline and cortisol into the bloodstream.

Adrenaline: This hormone prepares the body for immediate physical action by increasing heart rate, dilating the airways, and boosting blood flow to the muscles. Adrenaline helps the body respond quickly to stress.

Cortisol: Cortisol, is a more prolonged stress hormone. It helps the body manage stress over a longer period by increasing blood sugar levels and suppressing non-essential bodily functions, such as digestion and immune response. While cortisol is essential in managing stress short-term, its prolonged release during chronic stress can have negative consequences on gut health.

This change in hormones shifts your body’s priorities away from digestion and towards immediate survival.

Stress Can Slow or Disrupt Digestion

During stress, blood flow is redirected away from the digestive system.

This may:

• Slow down digestion
• Affect how food moves through the gut (this is known as gut motility)
• Lead to bloating or discomfort after eating

This is why meals can feel heavier or harder to digest when you’re stressed.

Stress May Affect Gut Bacteria

Your gut microbiome is sensitive to both physical and psychological stress.

Some research suggests chronic stress may:

• Influence the balance of gut bacteria
• Reduce beneficial microbial diversity
• Contribute to gut imbalance over time

(Cryan et al., 2019)

Increased Gut Sensitivity

Stress can make the gut more reactive and sensitive, this can affect how it responds to normal digestive processes.

This means you may:

• Feel more sensitive to certain foods
• Experience discomfort more easily
• Notice symptoms even with foods you usually tolerate

This is commonly seen in conditions involving gut sensitivity, where the digestive system becomes more reactive to normal processes or certain foods.

The Gut-Brain Feedback Loop

The gut-brain axis works in both directions:

• Stress can influence digestion
• Gut imbalance may influence mood and mental wellbeing

This creates a feedback loop, where stress and digestive symptoms can reinforce each other and can create a cycle.

Why Stress Can Cause Bloating

One of the most common questions is: why does stress cause bloating?

This is most liked linked to a combination of factors, this includes:

• Slower digestion
• Changes in gut bacteria
• Increased gut sensitivity

Together, these changes may contribute to a build-up of gas and digestive discomfort, which can result in bloating.

How to Support Your Gut During Stress

While stress is part of everyday life, there are ways to support your gut and reduce its impact.

Support Your Gut Microbiome

Probiotics may help support a balanced gut microbiome, particularly during periods of stress.

They can:

• Help maintain microbial balance
• Support digestive function
• Contribute to overall gut health

(NIH, 2023)

Focus on Gentle, Nourishing Foods

When your gut is under stress, simpler foods can be easier to tolerate and easier to digest.

Focus on:

• Fibre-rich plant foods
• Whole, minimally processed meals
• Staying hydrated

Support Digestion

When digestion is compromised, additional support may help.

Digestive enzymes (such as bromelain) may:

• Help break down food more efficiently
• Support nutrient absorption
• Reduce digestive strain

Manage Stress

While nutritional support can play a role, lifestyle habits are just as important when it comes to managing stress. 

Move your body regularly Exercise, whether that’s a run, using weights, yoga or even light movement like walking and stretching.

Spend time outdoors Getting outside, particularly in natural light, may help support your body’s natural rhythms.

Talk to someone Sharing how you feel with a friend, family member or professional.

Do something you enjoy Activities like reading, cooking, listening o music or a podcast, gardening, journalling or creative hobbies can help you unwind and reset.

Try breathing or relaxation techniques Simple breathing exercises or mindfulness practices can help calm the nervous system.

The key is finding what works for you and building it into your routine in a way that feels manageable.

By helping to calm and destress, any of these things can influence the gut-brain axis.

A More Supportive Daily Approach

Because gut health is influenced by multiple factors, a combined approach can be helpful.

Our Organic Gut Balance includes:

• Probiotics help to support beneficial bacteria
• Prebiotic fibres help to nourish the microbiome
• Digestive enzymes help to support food breakdown

This blend has been carefully formulated to help support your gut when life feels out of balance.

What About Adaptogens?

Adaptogens are natural compounds that are thought to help the body adapt to physical, mental and environmental stress.

Our Organic Daily Balance contains adaptogens ashwagandha, maca, ginseng and schisandra berry all to help support your body during times where you may feel out of balance.

Whilst our Organic Mushroom and Cacao blend contains lion’s mane and reishi mushrooms to help support focus, calm and clarity. Find out more about adaptogens.

Your Gut and Mind Are Closely Connected

Stress doesn’t just affect your mind. It also has a direct impact on your digestion.

By understanding the connection between the gut and the brain, you can better recognise how stress may influence your gut health and take steps to support your body during these periods.

When to Seek Further Advice

While stress-related digestive symptoms are common, persistent or unusual symptoms shouldn’t be ignored.

If you experience ongoing symptoms, it may help to:

• Keep a food and symptom diary
• Monitor how often symptoms occur

It’s advisable to speak to a healthcare professional if you notice:

• Persistent changes in bowel habits
• Ongoing bloating
• Unexplained weight loss
• Blood in your stool

FAQs

 

Daisy Buckingham ANutr, Registered Associate Nutritionist

This product is not intended to diagnose, treat, cure or prevent any disease. If you have a medical condition, or are pregnant or breastfeeding, we recommend consulting your healthcare professional before use.