Dr. John Gannage, MD

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Dr. John Gannage, MD

Dr. John Gannage is a Leader in Integrative Medicine to Restore Health and Prevent Disease

MARKHAM INTEGRATIVE MEDICINE is a clinic specializing in Integrative Medicine (integrating conventional and complementary/functional medicine) located in the City of Markham’s heritage district. DR. JOHN GANNAGE, MD is a leading provider of Integrative Medicine, offering health services as a licensed medical doctor to the Greater Toronto Area since 1992.

01/09/2026

Years of care. Generations of families. Lives changed.

What you see here isn’t a quick fix or a one-size-fits-all approach. It’s decades of listening, educating, and treating the whole person. From complex chronic conditions to long-term family care, the common thread is trust built over time and a commitment to understanding the root cause.

We’re deeply grateful to every patient who has shared their experience and allowed us to be part of their health journey. This work is personal, and it’s a privilege to do it alongside you.

If you’re looking for thoughtful, integrative care that meets you where you are, comment CARE to learn more about becoming a patient.

01/08/2026

Detoxification doesn’t happen in isolation. It relies heavily on what’s happening in your gut.

When dysbiotic bacteria are present, they can interfere with how waste is bound and eliminated through the stool. Instead of toxins being carried out of the body, those bonds are broken, allowing waste products to be reabsorbed through the colon. That means your system, especially the liver, has to process the same burden again.

Constipation, gut imbalance, and inefficient elimination don’t just affect digestion. They increase the overall detox load and can leave you feeling sluggish, inflamed, or unwell.

This is why supporting the microbiome is a critical part of any comprehensive detox strategy. The gut and detox pathways are constantly working together, whether we realize it or not.

If you’re dealing with ongoing symptoms and feel like detox just isn’t working for you, comment GUT to learn what a deeper evaluation looks like.

01/07/2026

At Markham Integrative Medicine, care starts with understanding the full picture. Not just symptoms, but the systems beneath them.

Our model of care is built around identifying root causes, using comprehensive assessment, targeted testing when appropriate, and personalized nutrition and treatment plans that evolve as your body heals.
By supporting digestion, immune balance, detoxification, and cellular health, we help create the conditions your body needs to move toward long-term resilience and wellbeing.

This is collaborative, education-driven care designed to meet you where you are and adapt as your needs change.

If you are ready to explore a more complete approach to your health, comment CARE to learn more about what a consultation looks like.

01/06/2026

In clinic, education is never an afterthought. It’s the foundation.

When we talk about symptoms like IBS, we’re not guessing. We’re mapping what’s happening inside the body, from the microbiome and vagus nerve to mast cell activity and immune signaling. These systems are communicating around the clock, and when that communication breaks down, symptoms follow.

By visualizing how the gut, brain, and nervous system interact, we can identify where regulation has been lost and build a plan that actually addresses the root cause. Diet, targeted supplementation, testing, and time spent understanding the why all matter.
Education leads to clarity. Clarity leads to motivation. And motivation is what drives lasting results.

If you’ve been living with chronic digestive symptoms and want a deeper, more connected approach, comment EDUCATION to learn what a comprehensive consultation looks like.

01/02/2026

If you’re dealing with unexplained symptoms like fatigue, congestion, headaches, brain fog, skin issues then your environment may be part of the story. Mold often hides in places most people never think to check, and by the time it becomes visible, it’s often been there far longer than you realize.

Bathrooms, kitchens, HVAC systems, fabric surfaces, attics, basements, closets, plants anywhere moisture lingers, mold can grow. That’s why identifying and addressing hidden exposure is a critical part of supporting long-term health.

If mold toxicity or chronic symptoms are on your radar, a thorough environmental review and functional medicine evaluation can help you understand what’s driving your health concerns and how to move forward safely.

Comment MOLD if you want to learn more about exposure, symptoms, and next steps.

01/01/2026

A new year invites reflection, intention, and a chance to reset.

Health is not built in a single moment or resolution, but through small, consistent choices that support your body’s ability to regulate, adapt, and heal. As we step into the year ahead, we’re grateful for the trust you place in us and the work we get to do alongside you.

May this year bring clarity, steadiness, and meaningful progress toward feeling your best.

Happy New Year from all of us!

12/31/2025

Most people think better health requires a big reset. A new plan. A dramatic overhaul.
�But in functional medicine, we see something different.

It’s the small, consistent choices that quietly shift your nervous system, your metabolism, and your immune balance.

Stepping outside for morning light. Taking a short walk. Eating with intention. Creating moments of calm. Practicing kindness. Prioritizing sleep.

These aren’t “little” things. They’re signals to your body that it’s safe to regulate, repair, and function well.

As you move into the new year, consider adding a few of these daily anchors into your life. Not all at once. Just enough to build momentum.

Health isn’t built in extremes. It’s built in what you repeat.

If you’re tired of pushing harder and ready to support your system more intentionally, comment, BALANCE to learn what a deeper approach looks like.

12/30/2025

Jet lag isn’t just feeling tired after a flight. It’s a temporary misalignment of your internal clock that affects sleep, mood, digestion, cognition, and performance.

When your circadian rhythm is out of sync with local time, every system in the body feels it. What looks like “just poor sleep” or “just travel fatigue” is often a deeper signaling mismatch driven by light exposure, sleep timing, meals, and hormones like melatonin.

In our latest blog, we break down the science behind jet lag and share practical, evidence-based strategies to reset your clock faster so you can think clearly, sleep better, and actually enjoy your trip.

Comment BLOG to learn how supporting your circadian rhythm can help you recover from jet lag in hours, not days.

12/29/2025

Chronic inflammation doesn’t always announce itself with pain. More often, it shows up quietly as fatigue, brain fog, mood changes, stubborn weight, or a sense that something just feels off.

Inflammation is meant to be protective. It helps you heal and fight infection. The problem starts when the immune system stays switched on too long. Hidden food sensitivities, gut imbalances, chronic stress, poor sleep, and hormonal disruption can all keep inflammation simmering under the surface.

In functional medicine, we focus on turning down that signal by supporting the systems involved. Nourishing the body with anti-inflammatory foods, restoring gut balance, calming the stress response, supporting detox pathways, and prioritizing sleep all help bring the immune system back into regulation.

When you address the drivers, not just the symptoms, the body can finally reset.

If you’re dealing with ongoing fatigue, brain fog, or unexplained inflammation, comment INFLAMMATION to learn what a deeper evaluation looks like.

12/26/2025

In functional medicine, we don’t stop at the diagnosis. We ask why the bloating. Why the brain fog. Why the anxiety, fatigue, pain, or cognitive changes.

A label like IBS, eczema, chronic fatigue, autism, or any other diagnosis tells us what you’re experiencing. It doesn’t explain the contributors that are driving it. Chronic symptoms almost always come from a negative synergy. Too many stressors at once. Too much inflammation, toxicity, immune activation. Not enough nutrients, hormonal support, or metabolic resilience.

The work is identifying those contributors and shifting the balance. Reducing what overwhelms the system. Restoring what’s missing. Supporting the way your immune, nervous, hormonal, and detox pathways communicate with each other every moment of the day.

That’s why functional medicine doesn’t chase a single mechanism or organ. It looks at the whole pattern. When you change the pattern, regulation follows.

If you’re ready to move beyond the label and understand what’s actually driving your symptoms, comment FUNCTION.

12/24/2025

Merry Christmas from all of us at Markham Integrative Medicine!

This season is a reminder to slow down, breathe a little deeper, and be present with the people and moments that matter most. Health is not just about what we do for our bodies, but how we allow ourselves to rest, connect, and enjoy life.

Wishing you peace, warmth, and a holiday filled with meaning as we close out the year together.

12/23/2025

Cadmium is a toxic metal most people don’t think about, yet it can show up in everyday foods like dark chocolate because plants absorb metals from the soil.

What matters most isn’t fear, it’s resilience. When the body is low in key nutrients like iron, zinc, and protein, toxic metals are absorbed more easily and cause more damage. When nutrient stores are supported, the body is better equipped to buffer oxidative stress.

This is why functional and naturopathic medicine focuses on nourishment first. Adequate protein, a wide range of colorful plant foods, and targeted nutrients like zinc, selenium, vitamin C, glutathione, or NAC help reduce the impact of metals like cadmium, lead, and mercury.

Balance changes how the body responds to exposure.
If you’re wondering whether toxic metals could be part of your health picture, comment METALS to learn more.

Address

300 Main Street Markham N
Markham, ON
L3P1Y8

Website

http://www.integrative-medicine.ca/

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