Gut Dysbiosis: Signs, Causes, and How to Restore Microbiome Balance Naturally

Gut dysbiosis is one of the most common and most overlooked root causes of chronic health problems in the United States. It happens when the trillions of microorganisms living in your digestive tract fall out of balance — too many harmful bacteria, not enough beneficial ones. That shift triggers a cascade of problems that reach far beyond your digestive system, affecting your immune function, your brain, your skin, your joints, and your energy levels.

Understanding gut dysbiosis matters because it is fixable. With the right approach through functional nutrition, you can identify the imbalances driving your symptoms and systematically rebuild a healthy microbiome. This article explains what dysbiosis actually is, how to recognize it, what causes it, and how a structured functional nutrition protocol can restore balance.

What Is Gut Dysbiosis?

Your gut contains somewhere between 38 and 100 trillion microorganisms — bacteria, fungi, archaea, and viruses — collectively called the gut microbiome. A healthy microbiome is diverse and dominated by beneficial strains like Lactobacillus and Bifidobacterium that protect the intestinal lining, produce short-chain fatty acids, regulate immune signaling, and synthesize vitamins like B12 and K2.

Dysbiosis occurs when this ecosystem tips out of balance. It can mean an overgrowth of pathogenic bacteria like Clostridium difficile or Klebsiella pneumoniae, an overgrowth of normally harmless yeast like Candida albicans, or simply a dramatic decline in microbial diversity. Any of these shifts creates a gut environment that no longer functions the way it should.

Dysbiosis vs. Leaky Gut: What Is the Difference?

These two conditions are often confused because they frequently occur together, but they are not the same thing. Dysbiosis is about who is living in your gut — the microbial composition. Leaky gut (intestinal permeability) is about what your gut is letting through — the structural integrity of the intestinal wall.

Dysbiosis commonly causes leaky gut. When pathogenic bacteria dominate, they produce toxic byproducts called lipopolysaccharides (LPS) that directly damage the tight junctions holding your intestinal cells together. Once those junctions break down, undigested food particles and bacterial fragments escape into the bloodstream, triggering the systemic inflammation that drives dozens of chronic conditions.

8 Warning Signs You Have Gut Dysbiosis

Because the gut microbiome influences so many body systems, dysbiosis symptoms are notoriously diverse. Most people with dysbiosis never connect their health complaints to their gut. Here are the most common warning signs:

• Chronic bloating and gas: Pathogenic bacteria ferment food differently than beneficial bacteria, producing excess gas. If you bloat after every meal — even healthy ones — dysbiosis is a likely contributor.
• Alternating constipation and diarrhea: The gut microbiome regulates motility. An imbalanced microbiome produces inconsistent bowel patterns that are often misdiagnosed as irritable bowel syndrome (IBS).
• Intense sugar and carbohydrate cravings: Pathogenic bacteria and yeast feed on sugar. Research published in BioEssays (2014) suggests that gut microbes can influence host food cravings by producing neurotransmitters and altering vagal nerve signaling to the brain.
• Recurring yeast infections or fungal issues: Frequent thrush, vaginal yeast infections, or athlete's foot often signal Candida overgrowth — a specific form of dysbiosis involving yeast dominance.
• Skin conditions: Eczema, acne, psoriasis, and rosacea are strongly correlated with gut dysbiosis. The gut-skin axis means that microbiome imbalances drive skin inflammation through systemic immune activation.
• Brain fog and poor concentration: The gut-brain axis runs bidirectionally through the vagus nerve. Gut microbes produce neurotransmitters including serotonin (90% of which is made in the gut), dopamine precursors, and GABA. Dysbiosis disrupts this production and impairs cognitive clarity.
• Chronic fatigue: Mitochondrial function depends partly on short-chain fatty acids produced by beneficial gut bacteria. When those bacteria decline, energy production suffers at the cellular level.
• Frequent colds and infections: Seventy percent of your immune system lives in your gut. Dysbiosis weakens immune surveillance and leaves you more vulnerable to pathogens and slower to recover from illness.

"Most people I see have been chasing individual symptoms for years — treating the eczema, treating the fatigue, treating the brain fog — without anyone ever looking at whether the gut is the common source," says Dr. Austin Elkin, Doctor of Chiropractic at City of Palms Chiropractic in Fort Myers. "When we address dysbiosis directly, those individual symptoms often resolve on their own."

What Causes Gut Dysbiosis?

Dysbiosis rarely has a single cause. It typically develops from a combination of factors over months or years. Understanding what drove your particular imbalance is critical for choosing the right corrective strategy.

• Antibiotic use: Antibiotics are the most disruptive force on the gut microbiome. A single course can reduce microbial diversity by 25–50%, and in some cases those populations do not fully recover without targeted intervention. The broader the antibiotic, the greater the collateral damage to beneficial strains.
• Diet high in sugar and refined carbohydrates: Harmful bacteria and yeast thrive on simple sugars. A diet heavy in processed foods, soft drinks, alcohol, and refined grains consistently selects for pathogenic microbes over beneficial ones.
• Chronic stress: Cortisol reduces secretory IgA, your gut's primary immune defense. Chronic psychological or physical stress creates a gut environment where pathogens can establish footholds that they could not maintain in a calm, well-defended microbiome.
• Hormonal birth control: Several studies have documented that oral contraceptives alter gut microbiome composition, reducing Lactobacillus populations and increasing inflammatory bacterial strains. This connection is underrecognized in clinical practice.
• Proton pump inhibitors and antacids: Stomach acid is your first line of defense against pathogens entering the gut. Suppressing it allows microbes to survive in the upper GI tract where they should not be, contributing to small intestinal bacterial overgrowth (SIBO).
• Environmental toxins: Glyphosate (used on most non-organic crops) has been shown in animal studies to preferentially kill beneficial Lactobacillus and Bifidobacterium strains while allowing more resistant, potentially pathogenic bacteria to survive.

How Functional Nutrition Tests for Dysbiosis

Unlike standard medical testing, functional nutrition uses comprehensive stool testing to assess the full microbiome landscape. Tests like the GI-MAP and Genova GI Effects analyze:

• Relative abundance of beneficial vs. pathogenic bacterial strains
• Presence of specific pathogens (parasites, opportunistic bacteria, fungi)
• Markers of intestinal permeability (calprotectin, zonulin, sIgA)
• Short-chain fatty acid production (a measure of microbiome health)
• Digestive enzyme sufficiency and fat absorption markers

This level of detail allows for a targeted intervention rather than a generic probiotic recommendation. Knowing that someone has Klebsiella overgrowth requires a different approach than knowing someone has low Lactobacillus and high Candida.

The 5R Protocol: How Functional Nutrition Restores Microbiome Balance

Functional medicine uses a sequential protocol called the 5Rs to address dysbiosis systematically. Each step builds on the previous one, and skipping steps typically produces incomplete results.

Step 1: Remove. Eliminate the factors maintaining the dysbiosis. This includes removing trigger foods (sugar, gluten, alcohol, processed foods), addressing any identified pathogens with targeted antimicrobials (berberine, oil of oregano, or pharmaceuticals when indicated), and removing dietary sources of pesticides and food additives. An elimination diet is often used during this phase to identify specific food triggers unique to that individual.

Step 2: Replace. Restore digestive function by replacing what dysbiosis has depleted. Many people with dysbiosis have low stomach acid (hypochlorhydria) and insufficient digestive enzymes. Without adequate stomach acid, food does not break down properly, and undigested particles ferment in the lower gut — feeding the very bacteria causing the problem. Betaine HCl and digestive enzyme supplements correct this before attempting to rebuild the microbiome.

Step 3: Reinoculate. Reintroduce beneficial bacteria and provide the substrates they need to thrive. This involves targeted probiotic supplementation (specific strains matched to identified deficiencies), fermented foods like sauerkraut, kimchi, and kefir, and prebiotic fibers from foods like garlic, onions, leeks, asparagus, and green bananas. Research in Nutrients (2019) confirmed that multi-strain probiotic supplementation combined with prebiotic fiber produces significantly greater microbiome restoration than probiotics alone. See our full article on how probiotics and prebiotics support gut health and spinal function.

Step 4: Repair. Heal any gut lining damage caused by the dysbiosis. Key repair nutrients include L-glutamine (primary fuel for intestinal cells), zinc carnosine (protects and restores the gut lining), collagen peptides (provides glycine and proline for tissue rebuilding), and deglycyrrhizinated licorice (DGL, which supports mucous membrane integrity).

Step 5: Rebalance. Address the lifestyle factors that created the dysbiosis in the first place. This means improving sleep quality (the microbiome follows a circadian rhythm and restores itself during deep sleep), managing chronic stress through movement and nervous system regulation, reducing environmental toxin exposure, and establishing long-term dietary habits that support microbial diversity.

How Chiropractic Care Supports Microbiome Recovery

The connection between spinal health and gut function is not theoretical — it is anatomical. The vagus nerve, which originates in the brainstem and passes through the cervical spine, is the primary communication pathway between your brain and your digestive tract. It regulates gut motility, stomach acid secretion, digestive enzyme release, and the anti-inflammatory tone of the gut lining.

When vertebral misalignments in the cervical or thoracic spine irritate or compress the nerve pathways serving the gut, digestive function slows. Motility decreases. Stomach acid drops. The environment becomes more hospitable to dysbiosis-causing pathogens. Chiropractic adjustments that restore proper alignment remove that interference and allow the gut to function as it was designed to.

This is why correcting dysbiosis through diet and supplements alone often produces partial results. If the nervous system is not supplying the gut with the signals it needs to function, the microbiome cannot stabilize. At City of Palms Chiropractic, we address both sides — the structural and the nutritional — so recovery is complete.

Start Restoring Your Microbiome in Fort Myers

Gut dysbiosis does not resolve on its own. Without addressing the underlying imbalances, the symptoms keep compounding — more food sensitivities, more fatigue, more inflammation — until the picture becomes complex enough to be genuinely disabling. The good news is that the gut microbiome is highly responsive to targeted intervention.

At City of Palms Chiropractic in Fort Myers, Dr. Austin Elkin combines comprehensive functional nutrition testing and protocols with corrective chiropractic care to address dysbiosis from every angle. Call (239) 690-7794 or schedule your free consultation online to find out what is actually driving your symptoms.