This article is part of Dr. Harrison’s gut health series. For how root-cause digestive care works at our Westminster clinic, start with our guide to gut health programs in Denver.
If you live in the Denver area and have been dealing with bloating, fatigue, brain fog, mood changes, or stubborn health concerns that never seem to come with a clear answer, there is one place worth examining more closely: your gut.
At Dr. Harrison’s Center of Functional Medicine, we work with patients from Denver, Westminster, Arvada, Broomfield, and surrounding Colorado communities. One thing we see again and again? Digestive health rarely stays limited to digestion.
Your gut interacts with your immune system, nervous system, metabolism, and ability to absorb nutrients. That is why checking your gut health can be an important step when symptoms keep returning—or when routine testing has not explained how you feel.
Your Gut Does Far More Than Digest Food
Most people think of the digestive system as a food processor. Eat food. Absorb nutrients. Move on.
It is much more involved than that.
Your gut and immune system constantly communicate
A large portion of the body’s immune activity is associated with the gastrointestinal tract. The intestinal barrier helps separate the body from microbes and other substances moving through the digestive system, while immune cells in and around the gut help decide what deserves a response.
When this environment is disrupted, it may affect inflammation, immune signaling, and how the body responds to outside stressors. That does not mean every immune condition begins in the gut. It does mean gut health is one part of the larger picture that should not be ignored.
The gut-brain connection is real—but it is not as simple as “serotonin equals happiness”
Most of the body’s serotonin is produced in the gastrointestinal tract. However, gut-produced serotonin does not simply travel to the brain and become a better mood. The more accurate story involves the gut-brain axis: a two-way communication network connecting the digestive system, nervous system, immune system, hormones, and gut microbes.
Colorado-based UCHealth describes the gut as a “second brain” because of this constant communication. That is one reason digestive symptoms, stress, sleep, mood, and cognitive complaints can overlap.
Your digestive system affects nutrient absorption
A healthy diet only helps if your body can break food down and absorb what it needs. Problems involving digestion, inflammation, bowel habits, or food tolerance may interfere with that process.
The possible signs are not always dramatic. They may include:
- Low energy
- Poor recovery
- Changes in hair or skin
- Trouble concentrating
- Nutrient deficiencies
- Feeling like your diet is “clean” but your body still is not responding well
These symptoms can have many causes. Gut health is not the only explanation—but it is a reasonable place to investigate when digestive complaints are also present.
Signs Your Gut Health May Need Attention
Some gut problems are obvious. Others show up alongside symptoms you might not immediately connect to digestion.
Consider speaking with a qualified healthcare professional if you are regularly experiencing:
- Bloating, gas, or abdominal discomfort after meals
- Constipation, diarrhea, or changing bowel habits
- Persistent heartburn or indigestion
- Unexplained appetite or weight changes
- Fatigue that does not improve with rest
- Brain fog or difficulty concentrating
- Food reactions that seem to be increasing
- Recurring skin concerns such as rashes or eczema
- Mood changes that occur alongside digestive symptoms
- A diagnosed autoimmune or inflammatory condition plus ongoing digestive complaints
These symptoms are not proof of a microbiome problem, food sensitivity, or “leaky gut.” They can also point to conditions that need conventional medical evaluation. Severe pain, blood in the stool, persistent vomiting, black stools, fever, fainting, or unexplained weight loss should be assessed promptly.
The frustrating part? Routine labs may come back within standard ranges even when a person still feels unwell. That does not make the symptoms imaginary. It means the next step should be a thoughtful evaluation—not another round of random supplements.
Why Checking Your Gut Health Matters More Than Guessing
Guessing at gut health is like changing random parts on your car and hoping the check-engine light turns off.
A probiotic might help. An elimination diet might help. Cutting dairy, gluten, sugar, coffee, or half the grocery store might also change symptoms temporarily.
But without understanding the full picture, it is easy to spend months chasing the wrong thing.
Depending on your symptoms and health history, a gut-focused evaluation may consider:
- Digestive symptoms and bowel patterns
- Dietary habits and possible food triggers
- Medication and antibiotic history
- Stress, sleep, movement, and hydration
- Signs of poor digestion or nutrient status
- Whether additional testing is appropriate
- Whether symptoms require referral or conventional diagnostic care
At our clinic, the goal of a functional medicine approach is not to attach every symptom to the gut. It is to look at how the body’s systems interact and identify the most reasonable factors to address first.
What About “Leaky Gut” and the Microbiome?
“Leaky gut” is used online as an explanation for almost everything. That is where the conversation gets messy.
The clinical concept behind the phrase is increased intestinal permeability. Research has linked changes in the intestinal barrier and gut microbiota with certain inflammatory and autoimmune processes, but the relationship is complex. Intestinal permeability may act as one contributing factor or trigger in susceptible people; it should not be presented as the single cause of every autoimmune condition.
If you want a deeper explanation, read our guide to leaky gut syndrome and the 5R approach.
The same caution applies to microbiome testing. Test results need clinical context. A long list of bacterial names is not useful by itself, and no single test can explain every symptom.
How the Denver Lifestyle Can Affect Gut Health
Colorado offers an active lifestyle, outdoor access, and a strong wellness culture. But being active and health-conscious does not make anyone immune to digestive problems.
A few local lifestyle factors can matter:
- Altitude and hydration: CU Anschutz explains that the body’s response to higher elevation can increase fluid loss and contribute to dehydration. Even though Denver is not a mountain summit, people who live, train, ski, or hike at higher elevations should pay attention to hydration.
- High-stress schedules: Stress can affect appetite, bowel habits, sleep, and the way digestive symptoms are experienced.
- Eating on the go: Fast meals and inconsistent routines can make it harder to notice which foods or habits are triggering symptoms.
- Alcohol use: Alcohol can worsen digestive symptoms for some people and may affect sleep and food choices.
- Antibiotic history: Antibiotics can temporarily disrupt the gut microbiome, and recovery may take months in some cases. That is also why automatically taking a probiotic after every antibiotic is not always the simple answer people expect.
The good news? Many of these factors are modifiable. The right plan may include targeted nutrition, better hydration, sleep support, stress management, movement, and careful use of supplements when appropriate.
No magic cleanse. No one-size-fits-all protocol. And no pretending one capsule fixes everything.
A Functional Medicine Approach to Gut Health in Denver
At Dr. Harrison’s Center of Functional Medicine, we serve Denver-area patients from our office in Westminster, Colorado.
Dr. Glenn Harrison takes time to review the patient’s health history, current symptoms, lifestyle, and previous testing. From there, the goal is to build a personalized health plan based on the individual—not a generic gut-health checklist pulled from the internet.
That process may involve looking at:
- What symptoms are happening now and when they began
- What has already been tested or treated
- Which diet, medication, stress, sleep, or lifestyle factors may be relevant
- Whether additional evaluation or testing is justified
- What changes are realistic, measurable, and appropriate for the patient
Gut symptoms can overlap with hormone concerns, immune conditions, and cognitive or mood complaints. That is why we may also evaluate related areas such as hormone health and brain health when the patient’s history supports it.
Take the First Step: Schedule a Free 15-Minute Discovery Call
You do not have to keep guessing your way through bloating, fatigue, brain fog, or digestive symptoms.
If you are in Denver, Westminster, Arvada, Broomfield, or a nearby Colorado community, schedule a free 15-minute discovery call with Dr. Harrison’s Center of Functional Medicine. We will discuss your concerns, explain our approach, and help you decide whether the clinic is a good fit for your next step.
Dr. Harrison’s Center of Functional Medicine
9035 Wadsworth Pkwy #3300
Westminster, CO 80021
Phone: 720-449-6217
Learn more about our gut health services in Westminster and the Denver metro area.
This article is for educational purposes only and is not a substitute for diagnosis or treatment from a licensed healthcare professional.