Work with a functional medicine doctor in Frankfort, IL

Providing functional medicine in Illinois to the communities of Frankfort and surrounding
areas including Mokena, New Lenox, Tinley Park and Beyond.

Functional Medicine in IL

Looking for a functional medicine doctor near you?

Did you know that functional medicine looks at the whole picture of your health, considering your genetics, environment, and lifestyle? This approach not only addresses symptoms but also targets the root causes of your health issues. At Holistic Health & Functional Medicine of Frankfort, we take great pride in offering personalized and comprehensive care to help you achieve optimal well-being.

Our Frankfort holistic doctor can help today! Call us to schedule an appointment at: (815) 469-7472

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At Holistic Health & Chiropractic of Frankfort, we specialize in Functional Medicine. Unlike conventional medicine, which often focuses on treating symptoms, functional medicine aims to identify and address the root causes of health issues, providing personalized and holistic treatment plans to help you achieve optimal well-being.

What is Functional Medicine?

How is it Different from Conventional Medicine?

As this tree of health suggests, symptoms are like leaves on a tree, there can be many that correlate with organ systems and result in what we classically call disease. Resolving the issues requires identifying the underlying root cause and correcting it, allowing the tree to heal.

What most people know as conventional medicine, “grew up” during a time when acute illnesses, such as infections, were the leading cause of death. And that system of symptom/disease treatment was developed to address those infectious diseases.

But nowadays, those acute issues are not the bane of our society as they once were, instead chronic illnesses are the big issue of our day. Cancers, autoimmune conditions, diabetes, and other metabolic issues are destroying people’s health. These chronic conditions don’t respond as well to antibiotics or drugs because they are lifestyle induced which means we need a healthcare system that looks at the whole person and not merely medicate the problem.

And that is where Functional Medicine fills the gap. Instead of chasing symptoms and over burdening the body with toxic drugs, the functional doctor takes a holistic approach and focuses on the body's biology and searching for the underlying cause.


  • Use standard diagnostics and tests: Blood and Urine


  • Tighter parameters on standard tests
  • Alternative tests such as saliva, hair, SIBO, SIFO, etc.
  • Use dietary changes and supplementation instead of medications
  • Recommend personalized care plans

How Do We Find the Underlying Root Cause?

The simple answer is: we test.

It is not unusual that the standard tests a regular doctor orders come back “within normal limits” yet the individual does not feel well. As a Functional Medicine doctor, we can use those same tests to glean valuable information.

By looking at the test results from a tighter parameter, through a stricter lens, those same tests can often reveal an issue hiding in plain sight.

Here's an example: if you have ever had your Vitamin D tested your report will show a standard acceptable range between 30 and 100 ng/dL. That is a very broad range. However, current research and thought leaders in the holistic field feel that 70-90 ng/dL is a more ideal range.

This helps explain why a patient that complains of fatigue, anxiety, irritability, who is frequently sick, muscle pain, and bone pain when their test results show 35. Technically they are within normal range but no where near the ideal or optimal range.

Many of these new, progressive tests have not been incorporated into mainstream use BUT they help give us a better understanding of the underlying causes. Probably the biggest difference between Functional Medicine Doctors is that instead of prescribing medications that merely mask the symptoms, we make personalized dietary, supplement and lifestyle changes to help the body heal itself.

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Comprehensive Functional Medicine Solutions

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At Holistic Health & Chiropractic of Frankfort, our Functional Medicine approach is designed to address a variety of chronic health conditions by targeting the root causes rather than just the symptoms.

Effective Treatment for Autoimmune Disease

Our primary goal is to calm your body’s immune response and reduce the self-attack on tissues. We start by thoroughly reviewing your medical and family history, lifestyle, diet, nutrition profile, and medication use to identify your unique triggers. Through personalized supplements and treatments, we work to modulate your immune system and alleviate symptoms.

Relief from Adrenal Fatigue

Adrenal fatigue can cause brain fog, memory issues, muscle and joint pain, and immune dysfunction. Our functional medicine approach addresses the underlying conditions causing these symptoms, helping your body restore balance and allowing you to live life to the fullest.

Improving Thyroid Health

For conditions like hypothyroidism, Hashimoto’s, and Toxic Multi-Nodular Goiter, functional medicine provides effective relief. We often begin with dietary changes, such as removing gluten, and eliminating harmful metals from the body. Supplements like Omega-3 and Vitamin D are used to support and improve thyroid and immune system function.

By addressing the whole person and employing a comprehensive treatment plan, we aim to help you achieve optimal health and well-being.

If you suffer from a chronic medical condition such as, an autoimmune disorder, or have thyroid or adrenal issues, call Holistic Health & Chiropractic of Frankfort today at (815) 469-7472 to schedule a consultation. We are conveniently located at 10229 West Lincoln Highway in Frankfort, IL.

Functional Medicine at Holistic Health & Chiropractic of Frankfort

Dr. Jon K. Heyer, D.C. is the Functional Medicine Doctor at Holistic Health & Chiropractic of Frankfort and uses the standard, conventional tests like any other doctor but with more scrutiny. When looking at test results through more stringent parameters, you’ll often find clues that were previously overlooked. People who have been told their numbers were normal but still don’t feel well are usually relieved when we can explain the underlying cause of their health problem.

When standard tests give you no answers, we dig deeper and use alternative tests like the ones previously mentioned. And, because of this, our approach to evaluating you and your body is more encompassing, which means we are able to help people with conditions such as depression, fibromyalgia, low energy levels, and an inability for your body to handle stress, functional medicine at Holistic Health & Chiropractic of Frankfort has a practical course of treatment. These symptoms often indicate a larger issue with your thyroid, adrenal, and immune systems, causing most of today's chronic illnesses which we can determine through our testing.

Frequently Asked Questions

Functional Medicine is an alternative approach to looking at standard medical tests for more accurate information to find the underlying root causes as to why someone may be ill and then using more natural approaches, such as diet and supplementation, to restore health, naturally.

We often use standard medical tests along with newer diagnostic tools to discover nutritional deficiencies and/or excessive toxicities and correct the trajectory of one’s health. If you have already had any testing done previously, Dr. Heyer will review those. If there are missing or additional tests that he would like done he will order them. Depending on what needs to be done, some testing can be done here in the office, for others, we may need to send you to a laboratory or even send some to a specialized lab.

When you come in for your first appointment, Dr. Heyer will get to know you, he will ask about your health history, current symptoms or concerns and your overall health goals. It is important to be fully honest, the more information you give, the better he can help. Before your initial appointment, we will send you an in-depth questionnaire, this will help give Dr. Heyer a good understanding of what areas of your body we need to focus on first. You will review the questionnaire, any testing, conduct a Contact Reflex Analysis (CRA), and discuss a game plan. After your first appointment we will then schedule a follow-up to track your progress.

Yes! We often recommend nutritional supplements in conjunction with lifestyle and dietary modifications. Dr. Heyer specifically tests you to see which supplements will work properly with your body. We offer the supplements here in the office or on our online store.

Services & Techniques

Our Other Services

At Holistic Health & Chiropractic of Frankfort, we take great pride in providing the finest chiropractic wellness care to our patients. Here is a sampling of the different chiropractic services we offer in our FRANKFORT office.

Holistic Health & Chiropractic of Frankfort

Monday 9:00 - 1:00 3:00 - 6:00
Tuesday Closed 3:00 - 6:00
Wednesday 9:00 - 1:00 3:00 - 6:00
Thursday 9:00 - 1:00 3:00 - 6:00
Friday Closed Closed
Saturday 9:00 - 1:00 Closed
Sunday Closed Closed