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SIBO Treatment Toronto | Naturopath for Bloating & IBS

 

If you've been dealing with chronic bloating, unpredictable bowel habits, gas, or digestive discomfort that no one seems able to explain - Small Intestinal Bacterial Overgrowth (SIBO) may be at the root of it. In many cases, symptoms like chronic bloating, constipation, or diarrhea are grouped under diagnoses such as IBS, even though the underlying cause is often SIBO.

SIBO is one of the most common - and most commonly missed - causes of digestive symptoms I see as a SIBO naturopath in Toronto. Research shows that up to 84% of people diagnosed with Irritable Bowel Syndrome (IBS) actually have SIBO. That means many people are managing symptoms for years without ever addressing the actual problem.

At NDcare Naturopathic Clinics, I take the time to properly investigate what's actually driving your symptoms - not just label them and hand you a plan that keeps you comfortable but doesn't get you better.

I’m Dr. Tara Andresen, a licensed naturopathic doctor in Toronto with over 16 years of experience treating SIBO, IBS, and chronic digestive issues.

What Is SIBO?

Your small intestine is designed to be relatively low in bacteria. Most of the microbial activity in your gut should be happening downstream in the large intestine. When bacteria overpopulate the small intestine - whether they've migrated up from the colon or grown unchecked due to impaired gut function - they ferment the food you eat before it can be properly digested. The result is gas, bloating, and a cascade of downstream digestive problems.

This is not an infection. It's an overpopulation of bacteria in a location where they don't belong. And because the symptoms look so much like IBS, it often goes unidentified for years.

The Three Types of SIBO - and Why It Matters

Not all SIBO is the same, and the type of bacterial overgrowth you have directly affects how it needs to be treated. This is one of the key reasons a one-size-fits-all approach doesn't work.

  • Hydrogen-dominant SIBO - typically associated with diarrhea and urgency
  • Methane-dominant SIBO (also called Intestinal Methanogen Overgrowth or IMO) - typically associated with constipation and sluggish motility. This is one of the most common drivers of chronic constipation seen in clinical practice.
  • Hydrogen sulfide-dominant SIBO - often associated with gas, bloating, and fatigue; can be harder to detect on standard breath testing and is frequently missed

Some patients have mixed presentations - both hydrogen and methane elevation, for example - which adds another layer of complexity. Identifying your specific type is a critical first step, because what works for one type may not work for another.

Symptoms of SIBO

Persistent bloating is one of the most common reasons patients begin investigating SIBO. The most obvious symptoms of SIBO are digestive, but it can also drive problems throughout the body - particularly when bacterial overgrowth has been present long enough to impair nutrient absorption and drive systemic inflammation.

Digestive symptoms:

Systemic symptoms that are often missed:

  • Fatigue and low energy - particularly after eating
  • Brain fog or difficulty concentrating
  • Skin conditions including rosacea, eczema, and acne
  • Joint pain or generalized inflammation
  • Iron deficiency or Vitamin B12 deficiency
  • Histamine intolerance
  • Multiple food sensitivities that seem to be getting worse over time

If you have several of these symptoms - especially bloating combined with fatigue, food sensitivities, or nutrient deficiencies - it's worth investigating SIBO as a contributing cause.

What Causes SIBO?

SIBO doesn't develop randomly. There's almost always an underlying reason the bacterial overgrowth took hold - and identifying that reason is critical to preventing it from coming back. Common contributing factors include:

  • Impaired gut motility - the migrating motor complex (MMC) is the "housekeeping wave" that sweeps bacteria through the small intestine between meals. When motility is sluggish, bacteria accumulate. This is one of the most common and most overlooked drivers of recurring SIBO.
  • Low stomach acid (hypochlorhydria) - stomach acid is a key barrier to bacterial overgrowth. When it's insufficient, bacteria pass into the small intestine unchecked.
  • Digestive enzyme insufficiency - impaired enzyme output can leave undigested food available for bacterial fermentation.
  • Previous gut infections or food poisoning - post-infectious IBS is a well-documented SIBO trigger. A stomach bug can damage the nerve cells controlling gut motility, setting the stage for overgrowth.
  • Chronic stress - impairs motility and alters gut immune function through the gut-brain axis.
  • Thyroid dysfunction - hypothyroidism slows motility throughout the GI tract.
  • Long-term use of proton pump inhibitors (PPIs) or other medications that alter gut function.
  • Structural issues or adhesions

In practice, I often find multiple contributing factors in a single patient. Treating the overgrowth without addressing these underlying drivers is one of the primary reasons SIBO keeps coming back.

Why So Many People Try to Treat SIBO on Their Own - and Why It Usually Doesn't Work

SIBO has become one of those conditions that gets a lot of attention online - podcasts, Reddit threads, YouTube videos, AI-generated protocols. Patients arrive at my clinic having already done months of research. They know what berberine is. They've heard of the low-FODMAP diet. They've ordered supplements off Amazon and tried them for a few weeks. And they're still struggling.

This is not because they haven't tried hard enough. It's because SIBO treatment is genuinely complicated, and the gap between knowing what something is and knowing how to use it correctly is significant.

A few of the most common issues I see:

Wrong type, wrong treatment

The herbs and interventions that work best for hydrogen-dominant SIBO are not the same ones that work best for methane-dominant SIBO or hydrogen sulfide SIBO. Without confirmed testing, you're guessing - and the wrong treatment can leave the overgrowth largely intact while causing unnecessary side effects.

Dosing and duration

Herbal antimicrobials can be highly effective - but the dose and duration matter enormously. Too low and you won't make a meaningful dent in the overgrowth. Too short and you leave the job unfinished, which can also contribute to resistance. These are not details you can reliably piece together from online sources, which tend to give ranges without the clinical context to apply them.

The biofilm problem

This is one of the most misunderstood aspects of SIBO treatment. Bacteria in the small intestine can form biofilms - a protective matrix that shields them from antimicrobial treatment. Disrupting these biofilms before or alongside antimicrobial therapy can significantly improve treatment outcomes.

Biofilm-disrupting supplements have become widely available, and many patients have tried them. But in my clinical experience, not all biofilm formulas are equally effective - and timing matters. Taking a biofilm disruptor at the wrong point in treatment, or choosing a formula that isn't well-matched to what you're dealing with, often produces no noticeable result. This leads people to conclude that biofilm disruption doesn't work, when the issue was actually the approach.

Knowing which formulas I've seen work consistently in practice, how to sequence them relative to antimicrobial treatment, and for how long - that's clinical experience that doesn't come from a supplement label or a podcast.

Missing the underlying driver

Even when someone successfully reduces bacterial overgrowth, symptoms often return within months if the reason the SIBO developed in the first place hasn't been addressed. Impaired motility is the most common culprit, particularly in patients with recurrent SIBO or IBS. Without prokinetic support to keep the migrating motor complex functioning properly, the environment that allowed SIBO to develop remains unchanged.

This is the piece that most online protocols miss entirely - and it's often the difference between lasting improvement and the frustrating cycle of treating and relapsing.

If any of this sounds familiar - if you've tried protocols you found online or put together with AI assistance and haven't gotten the results you were hoping for - you're not alone, and there's usually a clear reason it didn't work. That's exactly what a thorough assessment is designed to uncover.

Testing for SIBO in Toronto

A thorough assessment starts with your history - your symptoms, timeline, diet, stress, past infections, medication use, and digestive patterns. From there, I determine what testing makes sense for your situation.

SIBO Breath Testing

The lactulose breath test is the standard diagnostic tool for SIBO. After a preparatory diet and overnight fast, you consume a lactulose solution and provide breath samples every 20 minutes over three hours. The test measures hydrogen and methane gas levels - elevated readings indicate bacterial fermentation in the small intestine. This test is done at home and is non-invasive. It is not covered by OHIP but may be covered by extended health benefits.

Comprehensive Stool Analysis

This test assesses the bacterial and yeast populations in the colon, digestive enzyme function, inflammation markers, and signs of intestinal permeability. It gives a broader picture of what's happening throughout the digestive tract - not just the small intestine - and helps identify contributing factors that might not show up on breath testing alone.

Additional Testing

Depending on your presentation, I may also recommend food sensitivity testing, thyroid panels, nutrient levels (B12, iron, vitamin D), or other labs to identify contributing factors and rule out other causes of your symptoms.

Naturopathic Treatment for SIBO - My Approach

Treatment is individualized based on your test results, SIBO type, symptom severity, and what's driving the overgrowth. The goal is not just to reduce bacterial levels in the short term, but to address the conditions that allowed SIBO to develop and support lasting digestive health, including symptoms often labelled as IBS, chronic bloating, or constipation.

If you’re looking for a naturopath in Toronto to help identify and treat SIBO more effectively, you can learn more about my approach to care.

A comprehensive treatment plan typically involves reducing the overgrowth, restoring normal gut function and motility, addressing underlying drivers like motility or stomach acid, repairing the gut lining, and rebuilding a healthy microbiome - in a logical sequence that's tailored to your specific situation.

The details of that plan - which interventions, in what order, at what doses, and for how long - are determined based on your individual assessment. That clinical judgment is what makes the difference between a treatment that works and one that doesn't.

What to Expect at NDcare

My intake process is structured to make sure I understand the full picture before making any recommendations.

Visit 1 - 60-Minute Comprehensive Intake

We go through your full medical history, digestive timeline, diet, lifestyle, stress, and symptom patterns in detail. I'll share preliminary impressions and discuss what testing I'd recommend based on your specific presentation.

Visit 2 - 30-Minute Report of Findings

Once results are back, we review them together. I'll explain what the findings mean in plain language, walk you through the underlying causes we've identified, and present a clear, individualized treatment plan.

Appointments are available in-person at my downtown Toronto clinic (54 Wellington St East) and my Beaches clinic (2455A Queen St East), as well as virtually across Ontario.

Ready to Find Out What's Actually Driving Your Symptoms?

For those looking for a naturopath in Toronto for SIBO, a thorough assessment can help identify what’s actually driving your symptoms. If you've been dealing with chronic digestive symptoms - whether you're just starting to investigate or you've already been down the SIBO road without lasting results - I'd be glad to help you get a clearer picture. Book a free 15-minute consultation to talk through what you're experiencing and how a full naturopathic assessment could make sense for you.

 

NDcare Naturopathic Clinics - Downtown Toronto (54 Wellington St East) | The Beaches (2455A Queen St East) | Virtual across Ontario

  • Frequently Asked Questions About SIBO

How do I know if I have SIBO or IBS?

You can't tell from symptoms alone - they overlap almost completely. IBS is a diagnosis of exclusion that describes a symptom pattern without identifying a cause. SIBO is a cause. Research suggests that up to 84% of people with an IBS diagnosis have SIBO as an underlying driver. If you have IBS and haven't been tested for SIBO, it's worth investigating. Testing is non-invasive and done at home.

Can SIBO go away on its own?

Occasionally symptoms fluctuate, but SIBO rarely resolves without treatment - particularly when there's an underlying driver like impaired motility or low stomach acid maintaining the overgrowth. Without addressing the cause, even a successful course of treatment tends to be followed by recurrence.

Why does SIBO keep coming back?

Recurrence almost always comes back to an underlying driver that wasn't addressed - most commonly impaired gut motility. If the mechanism that normally clears bacteria from the small intestine between meals isn't working properly, the overgrowth will return. This is one of the most important and most commonly overlooked aspects of SIBO care.

I've already tried treating SIBO on my own. Can you still help?

Yes - and this is actually one of the more common situations I see. Patients who've done their own research and tried protocols they've found online or assembled with AI assistance often have a good understanding of SIBO conceptually, but haven't been able to get lasting results. A proper assessment usually reveals why - whether it's an unidentified SIBO type, an underlying driver that wasn't addressed, or a treatment approach that wasn't quite right for their situation.

Is SIBO breath testing covered by OHIP or insurance?

SIBO breath testing is not covered by OHIP, but many extended health benefit plans cover naturopathic services and associated testing. I can provide receipts for insurance submission.


 

Serving patients in downtown Toronto, the Beaches, and across the Greater Toronto Area including Mississauga, Brampton, Oakville, Vaughan, and surrounding communities.

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