Hello, I’m Dr. John Dempster, ND

  “It is my sincere belief that YOU can achieve an optimal state of health and well-being.”

Dr. John Dempster, ND
The Dempster Clinic - Center for Functional Medicine


Hello, I’m Dr. John Dempster, ND

  “It is my sincere belief that YOU can achieve an optimal state of health and well-being.”

Dr. John Dempster, ND


The Dempster Clinic COVID-19 guidelines are in place to minimize the risk of SARS-COV-2 transmission to patients,
Naturopathic Doctors (NDs), and staff.

Shop Online for Supplements

The Dempster Clinic acknowledges the importance of nutrients from a whole food diet, but also believes that the body needs supplementation to optimize your health and cellular rejuvenation. In most cases, the body has difficulty getting all of the nutrients it needs from diet alone due to the chemicals in our food and in our environment. These chemicals cause added stress that interfere with proper digestion and detoxification of harmful toxins that can cause chronic disease and weight gain.


Optimal Aging

Aging well is not merely about what we put on our skin, it ultimately begins from within. A Functional Medicine approach allows for tremendous insight and offers the tools to slow down the degenerative aging process by optimizing your biology, environment and genetics in a program custom designed for YOU! Learn more about how your body is aging and the important steps you can take to look and feel your best.

Chronic Fatigue

Are you tired of relying on stimulants just to make it through the day? We are all unique, thus the ‘one-size-fits-all’ approach to solving chronic fatigue does not benefit everyone. Get to the TRUE underlying root causes of your fatigue and start feeling the best you’ve ever felt!


Many of those with Autoimmune Disease are dealing with chronic levels of inflammation that are created through factors in their diet, environment, genetics, and even emotions.  There are many ways to identify and eliminate these triggers by using a Functional Medicine approach and initiating the body’s own healing response.


If you struggle with Irritable Bowel Syndrome, Inflammatory Bowel Disease, constipation, diarrhea, or simply feel ‘off’ in the stomach, please know that there are ways to relieve the pain and discomfort that you are experiencing. Uncovering the causes and triggers of these symptoms is critical in order to recover from these pesky and sometimes serious conditions.

Are You Ready To

Address Your Chronic Digestive Issues

In The Next 21 Days?


What is Intravenous Vitamin Therapy?

Intravenous Vitamin Therapy is the infusion of vitamins, minerals, amino acids, and other natural substances directly into the vein.  Bypassing the digestive system is the main advantage of IV nutrition.  When substances are given orally they must be processed through the stomach, liver, and intestines.  Many substances may be rendered inactive in the digestive tract, or may not be well absorbed due to poor intestinal function.  By directly administering nutrients to the bloodstream, therapeutic doses of nutrients in blood levels can be absorbed more efficiently.  It is important to note that each treatment is customized to the patient’s individual needs. Explore our IV Vitamin Treatments.

Intravenous Vitamin Therapy (IV Vitamin Therapy)


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Dr. Dempster, ND Blog - Everyday Health Tips


Anti-aging Success Through Natural Hormone Therapy

First strand of grey hair, fatigue, aching joints and fine lines on the face are all signs of the inevitable – aging. But I’m a firm believer in aging gracefully, especially when it comes to our largest and most exposed organ, the skin.  When talking about skincare, many believe that the only way to fix the “blemishes” on our skin is through expensive treatments and surgical procedures. While these treatments can have immediate effects, my first advice for beautiful and healthy skin is not related to needles and ointments. No matter your condition, if you want to fix your body,

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Bioidentical Hormone Therapy: How It Can Help You

Bioidentical Hormone Therapy: How It Can Help You

The body’s hormones control most of the bodily functions from digestion, growth, immune function, mood, appetite, and even libido. When hormones drop or become unbalanced, people often start noticing unpleasant symptoms like hot flashes, night sweats, weight gain, memory loss, and sleep issues.  Using bioidentical hormone replacement therapy can be a more natural and effective way to help the body get back in balance. At the Dempster Clinic, we offer bioidentical therapy in Toronto. We can help you come up with a treatment plan specific to your needs. Hormones and Optimal Health Both women and men need the proper amount

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Male Doctor Holding Saline Bag With Fruit Slices Inside In Hospital

Chronic Inflammation? How IV Vitamin Therapy Can Help

If you’ve been dealing with chronic inflammation, you often wonder what can be done to reduce or eliminate it. Acute inflammation generally happens when your body has trauma like an injury or microbial invasion like in a cut. The inflammation usually clears up within a week or two. Chronic inflammation is referred to as long-term inflammation that has spanned over many months to years. The body is not designed to exist in a state of chronic inflammation, so discovering and eliminating the root cause is important to returning the body to a state of homeostasis. Chronic Inflammation Symptoms Inflammation plays

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Are Chronic Digestion Problems and Depression Connected?

If you’ve been living with chronic digestion problems and depression for many years, you know how miserable this feels. Suffering from digestive upset like gas, bloating, diarrhea, and constipation can be very irritating to deal with. Add in depression symptoms, and it can often feel like too much. The good news is that there are many ways to help heal your gut and lessen all of the symptoms you’re dealing with.  When we think of the gastrointestinal tract, we think of the complex system that takes food in, digests it, and assimilates the nutrients for proper absorption, and then eliminates

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