The Link Between Allergies and Gut Health

Picture your gut as the bustling epicenter of your body’s health. It does more than digest food; it’s a vibrant ecosystem teeming with trillions of microorganisms, collectively known as the gut microbiota. These tiny inhabitants include bacteria, viruses, fungi, and other microbes, all working in harmony to keep you in tip-top shape.

Now, here’s where things get interesting: the health of your gut is intricately linked to the strength of your immune system! A balanced and diverse gut microbiota plays a pivotal role in training and supporting your immune cells.

Think of it like a well-synced national security team. The gut microbiota communicates with your immune system, helping it distinguish between friend and foe. When everything is in sync, your immune system knows when to kick into gear to fend off harmful invaders like viruses and bacteria, while also keeping inflammation in check.

But when there’s an imbalance in your gut microbiota—what we call dysbiosis—things can go awry. This imbalance can disrupt immune system regulation, leaving you more susceptible to infections, allergies, and autoimmune conditions.

In spring, seasonal allergies often come into full swing. We’ve gotten so accustomed to it being ‘normal’ to be allergic to nature that we often do not question why our body would be at odds with the environment!

That reliable time of the year when trees, grasses, and weeds decide to scatter their pollen like confetti and molds launch their spores into the great unknown can put our immune system into overdrive. This ever-diligent immune system, like some rigid Puritan, can respond quite negatively to party-going plant reproduction, marshaling white blood cells to the scene to put an end to the blasphemy. White blood cells produce antibodies that call forth histamine, our body’s misguided hero, dutifully going to work to fend off these supposed threats.

Histamine, though well-meaning, ends up orchestrating a series of events that can leave us longing for a seasonal skip button:

  • Eyes that swell up and weep as if watching the finale of your favorite tear-jerker
  • Sneezes that erupt in a relentless cascade, akin to popcorn popping in rapid succession,
  • A throat so itchy it feels as though you’ve swallowed a scratchy wool sweater,
  • Nasal passages more congested than rush-hour traffic,
  • Wheezing and coughing that attract more attention than a street busker, but without the applause

These are the unmistakable signatures of seasonal allergies, our body’s overzealous defense mechanism against the pollen and mold spores it unjustly deems harmful.

While many still often think that symptoms of poor gut health are limited to torso pain and uncomfortable visits to the bathroom, dysbiosis shows up in many ways. As a functional nutritionist, I’m deeply aware of the profound impact these hidden battles can have on our overall well-being. They extend beyond seasonal allergies, and many who have seasonal allergies happen to share some of these symptoms as well:

Unseen Symptoms:

  • Abdominal Discomfort or Pain: Those moments of cramping, bloating, or that general feeling of unease.
  • Irregular Bowel Movements: Yup, we’re talking about the internal discomforts like diarrhea or constipation.
  • Chronic Fatigue: Ever felt a relentless tiredness? Poor energy can be in part due to nutrient malabsorption.
  • Mood Changes: Anxiety or depression can sometimes be linked back to our gut health through something called the gut-brain axis.
  • Nutrient Deficiencies: When our gut isn’t absorbing nutrients properly, it can lead to deficiencies.
  • Joint Pain: Believe it or not, inflammation in the gut can actually contribute to joint discomfort!

Visible Symptoms:

  • Weight Changes: Significant fluctuations in weight can sometimes indicate underlying gut issues.
  • Skin Issues: Conditions like eczema or acne can be visible indicators of gut problems.
  • Appearance of the Abdomen: Severe bloating or distention of the abdomen can be a telltale sign.
  • Changes in Physical Appearance: Keep an eye out for those dark circles under your eyes – they might be trying to tell you something! They are referred to as “allergic shiners” in the alternative medicine community and are indicative of food intolerances.
  • Frequent Bathroom Trips: If you find yourself constantly running to the restroom, your gut might be trying to tell you something.

It’s crucial to understand that gut problems manifest in various ways, and it’s not a one-size-fits-all situation.

Your gut houses a significant portion of immune cells, making it a critical battleground in the fight against illness. The gut-associated lymphoid tissue (GALT), a vital component of your immune system located in the gastrointestinal tract, plays a leading role in immune surveillance and response team.

When your gut microbiota is thriving, it supports the function of GALT, helping to maintain immune tolerance and prevent unnecessary immune responses to harmless substances. But when dysbiosis occurs, this delicate balance is thrown off, potentially leading to heightened immune reactions, chronic inflammation that can increase pain and disrupt mood, as well as as allergic responses.

In essence, a healthy gut sets the stage for a robust immune system, while gut dysfunction can weaken your body’s defenses. So, nurturing your gut health isn’t just about digestion—it’s about fortifying your body’s natural armor against allergies, illness and keeping you in peak condition. Let’s go deeper:

What’s the Link Between the Gut and Allergies?

Our gut is a bustling hub for trillions of microorganisms, collectively known as the gut microbiota. We have more microorganisms in our gut than cells in our entire body! This diverse community of bacteria, viruses, and fungi plays a crucial role in maintaining a robust immune system and preventing allergies. While bacteria and other ‘germs’ have historically been viewed in strictly a negative light, we now know that many have benefits to the human body. There is even some research showing that various parasitic worms can play a role in preventing or treating autoimmune disease! (I’m also gagging over here) 


When there’s an imbalance in our gut microbiota (dysbiosis), it can throw our immune system off balance too. Having a robust and diverse population of all kinds of creepy crawly critters actually offers a protective effect as these tiny inhabitants of your gut are like the teachers and mentors of your immune system, helping it learn and grow so it can better protect you from potential threats. A thriving and robust gut microbiota is key to maintaining a healthy gut and a strong immune system.

The Role of Gut-Associated Lymphoid Tissue (GALT):

  • GALT, situated in our gastrointestinal tract, is like the immune system’s personal bodyguard.
  • It helps in immune surveillance and response, ensuring our bodies don’t overreact to harmless substances (like our own body tissue, foods, or grass and pollen)
  • The interactions between GALT and our gut microbiota influence immune tolerance, preventing unnecessary immune responses.

To sum it all up, maintaining a healthy gut microbiota and immune system is key to preventing and managing allergies.

The BEST Tips to Help You Reduce Allergies and Support Your Gut:

  • Maintain a Healthy Diet: Load up on fruits, veggies, and fiber-rich whole grains to keep your gut microbiome happy. They love the fiber and flavonoids found in produce!
  • Probiotics: Fermented foods like yogurt and sauerkraut can introduce good diverse bacteria into your gut not found in supplements, thus contributing and supporting your immune system.
  • Stay Hydrated: Don’t forget to drink plenty of water – it’s essential for gut health as it keeps stool soft enough to pass easily.
  • Limit Processed Foods: Opt for whole, unprocessed foods to minimize inflammation. Unprocessed foods contain many more non-nutritive compounds such as antioxidants and phytochemicals which are shown to reduce systemic inflammation and protect the immune system.
  • Identify Food Intolerances: Consider an elimination diet if you suspect certain foods trigger your symptoms. Not sure which one to try? Reach out for a Discovery Call and I’ll be happy to help guide you!
  • Omega-3 Fatty Acids: Incorporate sources like fatty fish and flaxseeds to combat inflammation by shoring up the anti-inflammatory hormones that quench inflammatory fires.
  • Reduce Sugar Intake: Too much sugar can wreak havoc on your gut microbiome, so cut back wherever you can and review labels of your staples to see if sneaky sugars are coming inw here you do not expect them.
  • Allergen-Proof Your Home: Keep your living space clean and allergen-free to minimize triggers. Investing in a HEPA filter can be a great relief!
  • Regular Exercise: Move your body regularly to support overall health, including your gut. Research shows exercise, especially outdoors, is associated with greater microbial diversity in the gut.
  • Manage Stress: Practice stress-reducing activities like yoga or meditation to keep your gut-brain axis in check.

Spring allergies might be in full swing, but with the right support, you can navigate through them like a pro. 

If you’re grappling with gut health issues and allergies, let’s chat! Book a discovery call today to explore how we can work together to address your concerns and boost your well-being.


Ni, Yangyue et al. “A target-based discovery from a parasitic helminth as a novel therapeutic approach for autoimmune diseases.” EBioMedicine vol. 95 (2023): 104751. doi:10.1016/j.ebiom.2023.104751

Print Friendly, PDF & Email

Leave a Comment

Your email address will not be published. Required fields are marked *