What is Leaky Gut?

June 16, 2025

The gut acts as the body’s ultimate gatekeeper. It’s where our digestive tract meets our bloodstream, thereby forming an essential and intimate interface with our body and the outside world. Every day, it completes the breakdown of pounds of food and then goes on to make its most important decision: what nutrients it needs to absorb and what is toxic and ought to be eliminated.

 

How Gut Health Impacts Nutrient and Toxin Absorption

The gut or the small intestine is composed of highly specialized cells that, arranged side by side, are particularly suited to absorb nutrients. But if the physical environment is disturbed, these cells quickly lose their bodily integrity, which also impairs their ability to absorb. If the disturbance continues, this will cause further damage to the gut lining, making the small intestine less effective at choosing nutrients and toxins.

The Impact of Medications on Gut Health and Bacterial Balance

Imbalances in gut bacterial flora and persistent inflammation lead to leaks in the small intestine’s barrier separating our blood supply from the outside world. Repeated exposures to pro-inflammatory and sensitive foods, as well as previous infections, can cause inflammation in the gut.

NSAIDS such as Ibuprofen are known to erode the gut lining and cause inflammation, other medications such as corticosteroids suppress immune function and disturb bacterial flora and antibiotics indiscriminately kill bacteria, causing bacterial flora disruptions in the small intestine.

THE LEAKY GUT FOOD PLAN 

EAT

AVOID

Plant based foods

Dairy

Gluten free grains

Gluten

Low sugar fruits

Sugar and Sweeteners

Lean Animal Protein

Soy products

Healthy Fats

Corn products

Why a Damaged Gut Leads to New Food Sensitivities and Allergies

When the gut experiences such a loss of integrity to its lining, it begins to absorb toxins and other unnecessary compounds into blood circulation while sparing nutrients, leaving them as waste. Usually, when nutrients are absorbed into the blood, they are immediately surveyed by the immune system to ensure they aren’t harmful. However, during leaky gut syndrome, the massive influx of new, unnecessary, and potentially toxic compounds into the bloodstream only serves to overwhelm and confuse the body’s immune system.

These new molecules can even mimic other similar molecules that are found elsewhere in the body or the environment, appearing discernible to the immune system. So if the immune system identifies a molecule that a healthy gut would have otherwise blocked as being dangerous and this molecule seems the same as one in the environment (such as pollen) or in the body (such as skin) then the next time the immune system encounters any one of those similar molecules it results in an overactive immune response, aka; allergy (seasonal) or autoimmunity (eczema) or food sensitivity!

This is why foods one person may freely consume one day can become food sensitivities the next. It is because when the gut becomes leaky, that food item is absorbed in a manner that appears toxic to the immune system and mounts a response, resulting in various symptoms.

How Gut Health Influences Skin, Joints and Beyond

Leaky gut syndrome also explains how conditions like eczema, allergies, arthritis, asthma, fatigue, headaches, bloating and stomach aches are all linked to disruptions to the physical environment of the gut. The building blocks for all of the body`s regenerative capacity can only come from what we eat, so if our gut is faulty and begins to accept building blocks of all shapes, sizes, and materials, soon the building blocks will be deranged and dysfunctional.

Leaky gut syndrome also provides a perfect example of how the body is interconnected by showing how the health of our gut can be linked to symptoms in our skin, joints, sinuses and lungs.

Ready to take control of your gut health? If you suspect you may be experiencing symptoms of leaky gut or want to learn more about how your digestive health impacts your overall well being, Aspire Natural Health is here to help.

Contact us today to book a consultation with one of our expert naturopathic doctors and start your journey toward a healthier, happier gut!

Frequently Asked Questions (FAQs)

What is leaky gut syndrome?

Leaky gut syndrome refers to a condition where the lining of the small intestine becomes damaged, allowing toxins, microbes and undigested food particles to leak into the bloodstream, which can trigger inflammation and immune reactions.

What are common symptoms and conditions associated with leaky gut?

Symptoms and conditions linked to leaky gut include bloating, stomach aches, fatigue, headaches, eczema, allergies, arthritis and asthma, as these can result from disruptions in gut barrier function and immune responses.

How do medications affect gut health and contribute to leaky gut?

Medications like NSAIDs (e.g., ibuprofen) can erode the gut lining and cause inflammation, corticosteroids can suppress immune function and disturb gut flora and antibiotics can disrupt the balance of beneficial bacteria, all of which may contribute to leaky gut.

Why do food sensitivities and allergies develop with leaky gut?

When the gut lining is compromised, it allows larger, potentially harmful molecules to enter the bloodstream, which can confuse the immune system and lead to new food sensitivities, allergies, or even autoimmune reactions.

What dietary changes can help manage or prevent leaky gut?

A leaky gut food plan typically emphasizes plant based foods, gluten free grains, low sugar fruits, lean animal protein and healthy fats, while avoiding dairy, gluten, sugar, soy products and corn products to reduce inflammation and support gut healing.


Conclusion

Leaky gut syndrome illustrates the profound connection between gut health and overall wellness. When the gut barrier is compromised, it can lead to a cascade of symptoms affecting not just digestion, but also the skin, joints, immune system and beyond. By understanding the factors that damage gut integrity such as poor diet, medication use and persistent inflammation and by making targeted lifestyle and dietary changes, it is possible to support gut healing and reduce the risk of chronic health issues. Prioritizing gut health is a crucial step toward achieving optimal, whole body wellness.

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Written By: Dr. Romi Raina ND
Call or Text: 905-426-9116
Email: info@aspirenaturalhealth.ca

About the Author

Dr. Romi Raina is a Toronto-based Naturopathic Doctor with nearly two decades of experience in holistic healthcare. Specializing in integrating natural therapies, he offers virtual consultations in dietary management, botanical medicine, and lifestyle counseling. Dr. Raina's unique approach combines scientific knowledge from his degrees in Life Sciences and Anthropology with insights from his service in the Canadian Armed Forces. As founder of Collaborative Education, he's committed to advancing naturopathic knowledge, embodying his philosophy that naturopathy helps patients thrive, not just survive.

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