Your gut feels off lately? It might not be your diet

Is your gut reactive but you can’t quite pinpoint the root cause?
You eat the same food every day and you’re fine, and then the next day you eat the same thing, but you bloat? You usually have regular bowel movements but suddenly things are feeling all backed up?

Most people think that gut issues mean a food issue, and that’s not always the case. If you answered yes to any of those, the likely culprit causing your gut issues is…

Stress.

Stress from work because management won’t replace your colleague who just left and now you’re picking up the slack. Stress from money, bills, and everything costing more. Stress because you’ve got too much to do and no time to do it. Stress because something always seems to go wrong at the worst time. Stress because everyone leans on you but you don’t really have that same support back. Stress because you’re trying to keep up with everything and still feel like you’re falling behind. And then being stressed that you’re stressed.

So yeah, we’re all stressed.

And this is what we might start to notice gets worse over time. Digestion slows down and you feel heavy and bloated. Foods that used to feel fine suddenly feel harder to tolerate. Bowel movements become irregular. You get that uncomfortable feeling after eating that you can’t really explain.

Stress can also change how quickly food moves through the gut. For some people this slows things down and they feel constipated, for others it speeds things up and they feel like they need to go more urgently. At the same time, the gut can become more sensitive under stress, meaning normal digestion starts to feel uncomfortable. Everything just feels more reactive.

At this point, people usually start cutting out foods. They think gluten or dairy might be the problem, and sure, it could be part of it. But elimination diets don’t seem to work, or they help for a day or two and things go right back to where they were.

This is because they are still so stressed. And now probably even more stressed because they listened to the influencer who said cutting out dairy would fix everything and it hasn’t. It becomes a vicious cycle.

Over time, this can go deeper than just symptoms. The gut microbiome can start to influence how the body responds to stress, meaning stress affects the gut, and the gut can also affect how strongly we feel stress. So instead of things settling down, the body can start to feel more easily overwhelmed.

But why does stress cause gut problems?

Research shows a strong connection between the gut and the nervous system. The nervous system controls our fight or flight response and our rest and digest state. We have two main systems working together:

So when we have chronically elevated levels of stress, our sympathetic nervous system is constantly being activated and we are not dropping into that rest and digest state.

It makes sense when you think about it. If we were being chased by a lion, our body would not be focusing on digesting our last meal.

But this is essentially what is happening under prolonged stress. Stress hormones like cortisol are constantly being released, keeping the body in that alert state and directly influencing how the gut functions, moves, and communicates with the brain.

What’s actually happening inside the gut?

Chronic stress can disrupt the gut microbiome and increase intestinal permeability, often referred to as leaky gut.

This means that less beneficial bacteria can start to decline, while less helpful bacteria can begin to dominate, creating an imbalance.

Stress hormones can also directly influence how gut bacteria grow and behave. These changes can happen relatively quickly during periods of stress, and they do not have to be extreme to start affecting how you feel day to day.

This imbalance can increase inflammation in the gut, affect how food is processed and tolerated, and further stimulate the stress response.

Increased intestinal permeability can also make the gut more reactive to foods that were previously well tolerated, which is why people often feel like they are suddenly sensitive to everything.

All of this feeds back into the same loop. Stress affects the gut, and the gut then reinforces that stress response.

Not all stress is bad

It is not about eliminating stress completely.

If we have the tools to cope, support, good sleep, regular meals, and some level of routine, the body is much more resilient. In those cases, the system does not become as dysregulated, and that negative feedback loop is less likely to take hold.

This is why gut health needs to be looked at more holistically.

So what can we actually do?

We cannot always remove stress, but we can support the body through it.

One of the most important things is supporting the beneficial bacteria in the gut. We do this by feeding them the types of fibres they thrive on, known as prebiotics. These are fermented by gut bacteria into beneficial compounds like short chain fatty acids, which play a role in gut health and overall function.

Gut bacteria do not just support digestion. They also play a role in producing compounds involved in mood and nervous system regulation. Some of these include neurotransmitters like serotonin and GABA, which are linked to how we feel and respond to stress.

We can also introduce beneficial bacteria through probiotics. Some research suggests certain strains may help support the stress response, influence nervous system activity, and reduce symptoms like bloating and discomfort.

Bringing it back

Supporting your gut is not about cutting more foods out or trying to be perfect.

It is about creating a more stable internal environment, one that can handle the day to day stress that life brings. Small, consistent inputs tend to work better than extreme or restrictive approaches.

Because sometimes it is not that your body cannot tolerate the food anymore. It is that your body is just under more pressure than it used to be.

And when you start supporting it in the right way, things can begin to feel a lot more steady again.

For some people, that looks like adding in simple, consistent support each day. Something like the Gut Health Blend is designed to do exactly that, providing a fibre based base and targeted ingredients that support digestion quietly in the background, without needing to overhaul everything else.

References

Khazaei, M., Bahar, A., Porbaran, M., & Tahmasebi, H. (2026). Diet and gut microbiota during depression and stress. Discover Food, 6(1), 111. https://doi.org/10.1007/s44187-026-00846-8

Marwaha, K., Cain, R., Asmis, K., Czaplinski, K., Holland, N., Mayer, D. C. G., & Chacon, J. (2025). Exploring the complex relationship between psychosocial stress and the gut microbiome: Implications for inflammation and immune modulation. Journal of Applied Physiology, 138(2), 518–535. https://doi.org/10.1152/japplphysiol.00652.2024

Tofani, G. S. S., Leigh, S.-J., Gheorghe, C. E., Bastiaanssen, T. F. S., Wilmes, L., Sen, P., Clarke, G., & Cryan, J. F. (2025). Gut microbiota regulates stress responsivity via the circadian system. Cell Metabolism, 37(1), 138–153.e5. https://doi.org/10.1016/j.cmet.2024.10.003