Your digestive system does far more than process food. It houses roughly 70 percent of your immune system, produces key neurotransmitters that regulate mood and cognition, and serves as one of the body’s primary communication networks, connecting your gut to your brain, your hormones, and nearly every other organ.
When digestion breaks down, the consequences reach well beyond the stomach. Fatigue, brain fog, skin problems, joint pain, mood changes, hormonal imbalances, and autoimmune conditions can all trace back to a gut that is not functioning properly.
At Vitality Family Health, we treat digestive disorders differently from most conventional practices. Rather than prescribing medications to suppress symptoms, we investigate the root cause. We use advanced lab testing to identify what is actually happening inside your gut, whether that is a microbiome imbalance, bacterial overgrowth, food sensitivities, intestinal permeability, or an infection, and we build a personalized plan to restore healthy digestive function from the ground up.
Gut and digestive disorders encompass a wide range of conditions that affect the gastrointestinal (GI) tract, from the esophagus to the colon. Some of the most common include:
Irritable Bowel Syndrome (IBS) is a functional GI disorder characterized by chronic abdominal pain, bloating, and altered bowel habits (constipation, diarrhea, or both). It is one of the most prevalent digestive conditions, affecting an estimated 25 to 45 million Americans.
Gastroesophageal Reflux Disease (GERD) occurs when stomach acid frequently flows back into the esophagus, causing heartburn, chest discomfort, regurgitation, and, over time, potential damage to the esophageal lining.
Small Intestinal Bacterial Overgrowth (SIBO) develops when bacteria that normally reside in the large intestine migrate into and overgrow in the small intestine, producing excess gas, bloating, abdominal pain, diarrhea, and nutrient malabsorption. Its cousin, small intestinal fungal overgrowth (SIFO), involves a similar process with yeast rather than bacteria.
Leaky Gut (Increased Intestinal Permeability) is a condition in which the tight junctions of the intestinal lining become compromised, allowing undigested food particles, bacterial toxins, and other foreign substances to pass into the bloodstream. This can trigger widespread inflammation and immune activation, and is increasingly linked to autoimmune conditions, food sensitivities, and chronic inflammatory diseases.
Food Sensitivities and Intolerances involve immune or enzymatic reactions to specific foods (such as gluten, dairy, eggs, or soy) that produce digestive symptoms and often systemic effects, including fatigue, headaches, joint pain, and skin issues.
Other common digestive conditions include Candida overgrowth, H. pylori infection, inflammatory bowel disease (Crohn’s and ulcerative colitis), chronic constipation, and functional dyspepsia. While these conditions present with overlapping symptoms, the underlying mechanisms can be very different, which is precisely why a one-size-fits-all approach to treatment so often fails.
Do you deal with chronic bloating, gas, or stomach pain that no one can explain?
Have you been diagnosed with IBS and handed a prescription, but your symptoms keep coming back?
Do certain foods seem to trigger flares, but you can’t figure out which ones or why?
Are you relying on antacids, PPIs, or over-the-counter remedies just to get through the day?
Have you noticed that your digestive problems come with fatigue, brain fog, skin issues, or mood changes that seem unrelated but never go away?
Digestive diseases affect a staggering portion of the population. Functional gastrointestinal disorders alone impact an estimated 40 percent of people globally, and claims-based data in the U.S. show that nearly one in three commercially insured adults carries a digestive disease diagnosis. Yet despite how common these conditions are, the conventional approach to treating them remains frustratingly superficial.
In a typical 7-minute office visit, there is rarely time to investigate why a patient’s gut is malfunctioning. Instead, the focus is on managing symptoms: antacids for reflux, laxatives for constipation, anti-diarrheals for loose stools, and a broad diagnosis of IBS for everything that does not fit neatly into another category. Proton pump inhibitors (PPIs) are among the most prescribed medications in the country, yet long-term use has been linked to nutrient malabsorption, increased risk of bone fractures, kidney disease, and disruption of the gut microbiome itself.
The deeper problem is that the symptoms of digestive disorders, including bloating, gas, diarrhea, constipation, and abdominal pain, can be produced by very different underlying mechanisms. SIBO, Candida overgrowth, food sensitivities, low stomach acid, impaired motility, stealth infections, and intestinal permeability all look remarkably similar on the surface. Without proper testing to distinguish between them, treatment is essentially guesswork, and masking symptoms with medication allows the real issue to progress unchecked.
Your gut is home to trillions of microorganisms, collectively known as the microbiome, including over 1,000 species of bacteria along with fungi, viruses, and archaea. In a healthy gut, beneficial bacteria outnumber harmful species and perform critical functions: digesting fiber, producing short-chain fatty acids (SCFAs) that nourish the intestinal lining, synthesizing vitamins like B12, thiamine, and riboflavin, supporting immune regulation, and producing neurotransmitters that influence brain function. This is why people with poor gut health so often report brain fog, and why the gut is frequently consulted the body’s “second brain.”
When the balance of the microbiome is disrupted, a condition consulted dysbiosis, the consequences are far-reaching. Dysbiosis has been linked to IBS, inflammatory bowel disease, autoimmune conditions, metabolic disorders, depression, anxiety, and even neurodegenerative diseases. A 2025 meta-analysis of IBS patients consistently found reduced microbial diversity, decreased beneficial Firmicutes bacteria (especially Clostridia), and increased Bacteroidota, along with lower levels of protective short-chain fatty acids.
The lining of your intestine is only one cell thick, and its integrity depends on tight junction proteins that control what passes from the gut into the bloodstream. When these junctions are compromised by inflammation, dysbiosis, chronic stress, medications (including NSAIDs and PPIs), alcohol, or dietary triggers like gluten, the barrier becomes permeable.
Undigested food particles and bacterial endotoxins (lipopolysaccharides, or LPS) then enter the bloodstream, triggering an immune response that can manifest as food sensitivities, systemic inflammation, skin conditions, joint pain, brain fog, and autoimmune disease.
Research has shown that increased intestinal permeability is present not only in digestive conditions like IBS and IBD but also in autoimmune thyroid disease, type 1 diabetes, rheumatoid arthritis, and other systemic conditions. Elevated zonulin, a protein that regulates tight junctions, has become a key marker for assessing intestinal barrier function.
The small intestine is designed to have relatively few bacteria compared to the colon. Gastric acid, bile, and healthy intestinal motility normally keep bacterial populations low in this region. When these protective mechanisms fail, due to low stomach acid (often from long-term PPI use), impaired motility, structural abnormalities, or prior infections, bacteria from the colon can colonize the small intestine. These bacteria ferment food prematurely, producing hydrogen, methane, or hydrogen sulfide gas and causing bloating, abdominal distension, pain, diarrhea or constipation, and malabsorption of nutrients.
SIBO is estimated to be present in a significant portion of IBS patients, though exact prevalence varies widely depending on testing methods. SIFO (small intestinal fungal overgrowth) involves Candida or other yeast species and produces similar symptoms. Both conditions can be identified through breath testing and addressed with targeted antimicrobial protocols.
The gut and the brain communicate constantly through a network known as the gut-brain axis, which includes the vagus nerve, the enteric nervous system (over 100 million nerve cells lining the GI tract), and chemical messengers produced by gut bacteria.
Approximately 90 percent of the body’s serotonin, the neurotransmitter most associated with mood regulation, is produced in the gut, not the brain. This is why digestive dysfunction so frequently comes packaged with anxiety, depression, poor concentration, and brain fog.
For years, the assumption was that stress and anxiety caused gut problems. Emerging research has flipped that model, showing that gut dysfunction can drive mood and cognitive symptoms rather than the other way around. This has profound implications for treatment: healing the gut can improve mental health symptoms that had previously been attributed entirely to psychological causes.
Food sensitivities differ from true food allergies. Allergies involve an immediate IgE-mediated immune response and can be life-threatening. Sensitivities, by contrast, involve delayed immune reactions (often IgG or IgA-mediated) that may not produce symptoms for 24 to 72 hours, making them extremely difficult to identify without testing. Common triggers include gluten, dairy, eggs, soy, corn, and certain food additives.
When the gut barrier is compromised, the immune system is more likely to react to food proteins that should not be entering the bloodstream in the first place. This creates a cycle: leaky gut leads to food sensitivities, which trigger inflammation, which further damages the gut lining. Breaking this cycle requires identifying the reactive foods, removing them temporarily, and healing the gut so that tolerance can be rebuilt over time.
The digestive symptoms of gut dysfunction include chronic bloating and abdominal distension, excessive gas, heartburn and acid reflux, stomach cramps and abdominal pain, diarrhea (chronic or intermittent), constipation, alternating diarrhea and constipation, nausea, and a feeling of fullness after eating only small amounts.
Because the gut affects virtually every system in the body, digestive dysfunction also produces a wide range of non-GI symptoms. These include persistent fatigue, brain fog and difficulty concentrating, anxiety and depression, skin conditions such as eczema, acne, and rosacea, joint pain and muscle aches, frequent infections or slow immune recovery, unexplained weight changes, sugar cravings, bad breath (halitosis), and nutrient deficiencies despite a seemingly adequate diet. If you are experiencing digestive symptoms alongside any of these systemic complaints, the gut is likely a central piece of the puzzle.
Several factors increase vulnerability to gut and digestive disorders. A history of antibiotic use (which disrupts the microbiome), chronic use of PPIs or NSAIDs, a diet high in processed foods, sugar, and refined carbohydrates, chronic stress, food poisoning or traveler’s illness (which can trigger post-infectious IBS or SIBO through the development of anti-vinculin antibodies), and a history of autoimmune conditions all raise risk. Environmental toxin exposure, a sedentary lifestyle, poor sleep, and a family history of digestive or autoimmune conditions are additional contributors. Women are more commonly affected by functional GI disorders, and stress and anxiety are consistently among the strongest risk factors for IBS.
At Vitality Family Health, we treat the gut as one of the most foundational systems in the body. When a new patient presents with digestive complaints, the gut is often the first place we focus, because restoring healthy digestive function frequently resolves issues that extend far beyond the GI tract.
We go far beyond a standard GI workup which is typically a scope that doesn’t pick up infections or bacterial overgrowths. Depending on your symptoms and history, testing may include comprehensive stool analysis (to evaluate the microbiome, assess for dysbiosis, detect parasites, evaluate digestive enzyme function, and measure inflammatory markers), food sensitivity panels (IgG and IgA-mediated reactions), markers of intestinal permeability (including zonulin), and assessment of related systems including thyroid function, adrenal health, and nutrient status. Our goal is to arrive at a precise diagnosis so we understand exactly what is driving your symptoms.
Based on your test results, we create a step-by-step protocol to restore gut function. This often follows a structured approach: first removing the offending triggers (pathogenic bacteria, yeast overgrowth, reactive foods, and environmental irritants), then replacing what is missing (digestive enzymes, stomach acid support, bile salts if needed), followed by reinoculating the gut with beneficial bacteria through targeted probiotics and prebiotic foods, and finally repairing the intestinal lining with nutrients like L-glutamine, zinc carnosine, and anti-inflammatory compounds. This is not a generic protocol. Every step is informed by your lab results and tailored to your specific situation.
We work with you to build an eating plan that reduces inflammation, supports the microbiome, and eliminates identified food triggers. For some patients, a short-term elimination diet may be recommended to calm the immune system and identify reactive foods. We emphasize whole, nutrient-dense foods, adequate fiber to support beneficial bacteria and SCFA production, and the avoidance of processed foods, excess sugar, and inflammatory ingredients. For patients with SIBO, a modified low-FODMAP approach may be used during the treatment phase to reduce fermentable substrates that feed the overgrowth.
When testing identifies SIBO, Candida overgrowth, H. pylori, or other infections, we use targeted antimicrobial protocols, which may include herbal antimicrobials, pharmaceutical antibiotics when clinically appropriate, or a combination of both. We also address the underlying cause of the overgrowth, whether that is impaired motility, low stomach acid, or a structural issue, so that recurrence is less likely. Supplementation is guided by your lab results and may include specific probiotic strains matched to your condition, digestive enzymes, gut-healing nutrients, and support for any nutrient deficiencies caused by malabsorption.
Because the gut-brain axis is bidirectional, chronic stress directly impairs digestive function by reducing stomach acid production, slowing motility, increasing intestinal permeability, and shifting the microbiome toward inflammatory species. We assess your stress load and help you develop sustainable strategies for stress management, improved sleep, and nervous system regulation. For many patients, these lifestyle interventions are just as important as any supplement or dietary change.
Food sensitivities differ from true food allergies. Allergies involve an immediate IgE-mediated immune response and can be life-threatening. Sensitivities, by contrast, involve delayed immune reactions (often IgG or IgA-mediated) that may not produce symptoms for 24 to 72 hours, making them extremely difficult to identify without testing. Common triggers include gluten, dairy, eggs, soy, corn, and certain food additives.
When the gut barrier is compromised, the immune system is more likely to react to food proteins that should not be entering the bloodstream in the first place. This creates a cycle: leaky gut leads to food sensitivities, which trigger inflammation, which further damages the gut lining. Breaking this cycle requires identifying the reactive foods, removing them temporarily, and healing the gut so that tolerance can be rebuilt over time.
Your safety always comes first. Seek urgent or emergency care right away for the following: chest pain, vomit that contains blood or looks like coffee grounds, black or tarry stools, blood in the stool, trouble swallowing, persistent vomiting that will not stop, severe abdominal pain with fever, unexplained rapid weight loss, ongoing dehydration, fainting, or new jaundice (yellowing of the skin or eyes). These symptoms may indicate a serious or emergent condition that requires immediate medical evaluation.
If you have been using over-the-counter antacids or PPIs for weeks or longer, we can help review safer long-term options. If you are currently taking prescription medications for a digestive condition, do not stop them without consulting your prescribing clinician. We coordinate with your existing healthcare providers to ensure safe, comprehensive care.
Occasional heartburn can happen after a heavy meal, but frequent or chronic heartburn is not normal. It is your body’s signal that something is off, whether that is low stomach acid (which is actually more common than excess acid), a hiatal hernia, SIBO, food sensitivities, or impaired esophageal motility. Long-term suppression of acid with PPIs can mask the true cause and create additional problems, including nutrient malabsorption and microbiome disruption. We investigate the root cause so you can find lasting relief.
IBS (irritable bowel syndrome) is classified as a functional disorder, meaning the structure of the intestines appears normal on imaging and endoscopy, but the gut does not function properly. IBD (inflammatory bowel disease), which includes Crohn’s disease and ulcerative colitis, involves visible inflammation and structural damage to the intestinal lining. IBD is an autoimmune condition that requires specialized medical management. While their symptoms can overlap, the treatment approach is quite different. Functional medicine can support patients with both IBS and IBD, though we always coordinate with gastroenterologists for IBD care.
It is very possible. SIBO and SIFO are among the most common yet underdiagnosed causes of chronic bloating, abdominal distension, gas, and altered bowel habits. SIBO occurs when bacteria from the colon overgrow in the small intestine, while SIFO involves fungal overgrowth in the same area. Both can be identified through specific testing (breath testing for SIBO, and sometimes stool or small bowel aspirate for SIFO) and treated with targeted antimicrobial protocols.
Not necessarily. While gluten and dairy are common triggers, we prefer to test rather than guess. Food sensitivity testing and a structured elimination protocol can help identify exactly which foods are contributing to your symptoms, so you are not unnecessarily restricting your diet. That said, if you have celiac disease, a confirmed gluten sensitivity, or an autoimmune condition, gluten removal may be an important part of your plan.
Research has raised legitimate concerns about the long-term use of proton pump inhibitors. Extended PPI use has been associated with magnesium deficiency, calcium malabsorption, increased risk of bone fractures, vitamin B12 deficiency, kidney disease, and disruption of the gut microbiome. PPIs can also mask more serious underlying conditions. If you have been taking PPIs for an extended period, we can work with you to identify the root cause of your reflux and explore a plan to safely taper off when appropriate.
Probiotics and fiber can be very helpful, but the specific strains, doses, and timing matter. A generic probiotic from the store may not address your particular imbalance, and in some cases (like active SIBO), certain fibers can temporarily worsen symptoms by feeding the overgrowth. We use your test results to recommend targeted probiotic strains and the right type and amount of fiber for your current gut condition.
Absolutely. The gut and brain are in constant two-way communication through the vagus nerve and the enteric nervous system. Chronic stress reduces stomach acid production, slows intestinal motility, increases intestinal permeability, shifts the microbiome toward inflammatory species, and amplifies pain perception in the gut. Many patients notice that their digestive symptoms flare during stressful periods. Addressing stress is not optional in a gut healing plan; it is foundational.
Yes. Many aspects of digestive care, including lab result reviews, nutritional counseling, supplement guidance, and follow-up visits, can be conducted effectively via telehealth for patients anywhere in the state of Illinois. Initial evaluations and certain testing may benefit from an in-person visit at our Oak Brook office.
The discovery consult is a brief, no-pressure conversation where you can share what you have been experiencing with your digestive health, ask questions about our approach, and find out whether Vitality Family Health is the right fit. We will listen, discuss your situation, and outline what a comprehensive evaluation might look like. There is no cost and no obligation.
You may also want to read about Thyroid Imbalances, Chronic Fatigue, Autoimmune Diseases, Chronic Inflammation, and Hormone Optimization, since these areas often overlap with cardiometabolic health and day-to-day recovery.
Medically Reviewed By: Dr Kori Feldman, M.D.
Vitality Family Health & Wellness Partners is located in Oak Brook, Illinois, and serves patients throughout the Greater Chicagoland Area and the entire state of Illinois. These areas include but are not limited to the downtown Chicago area, surrounding suburbs, central, northern, and southern Illinois, and southern Wisconsin and Northwest Indiana.