Healthy Living/Detox

IBS and Bloating: Functionally Heal Your Digestive System

November 18, 2025

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I'm Lisa, functional medicine dietitian, certified nutritionist, and gut health expert helping you find health and wellness you deserve!

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Let’s be real—nothing hijacks your day faster than your digestive system going rogue. Whether it’s bloating that makes you feel six months pregnant after a “normal” meal, gas that could clear a room, or the constant need to map out every bathroom within a three-mile radius, gut issues can steal your joy, your energy, and your freedom.

You’re not alone. Digestive problems are one of the most common reasons people seek medical help, yet too often the solutions offered only scratch the surface. Fiber supplements, acid blockers, or vague advice like “just reduce stress” might give short-term relief—but they rarely solve the root problem.

That’s where functional medicine comes in. By looking deeper—at food sensitivities, bacterial imbalances, gut lining integrity, and even stress hormones—we can uncover what’s really going on and finally bring balance back to your digestive system.

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IBS: More Common Than You Think

Irritable Bowel Syndrome (IBS) affects an estimated 20% of Americans—that’s one in five people dealing with bloating, abdominal pain, gas, constipation, diarrhea, or some miserable mix of all of the above.

If you have IBS, you know it’s not just a “tummy problem.” It dictates your social calendar, what you wear (hello, stretchy pants), and even how much energy you can bring to your family, your job, or your workouts.

Conventional medicine often labels IBS as a “functional disorder,” which is code for: we don’t fully understand it, but here’s a prescription. Functional medicine flips that script and asks: why is your gut so reactive in the first place?


Root Causes of Digestive Distress

There’s no one-size-fits-all reason for IBS, but two big root causes show up over and over again:

1. Food Sensitivities

Food sensitivities (different from food allergies) quietly inflame your gut lining and immune system. Unlike allergies, which cause an immediate reaction, sensitivities create delayed symptoms—anything from bloating and skin rashes to brain fog and joint pain hours or even days after you eat.

2. Bacterial Imbalances (a.k.a. Dysbiosis or SIBO)

Your gut microbiome—the community of bacteria living in your digestive tract—plays a starring role in health. When the wrong bacteria set up camp where they don’t belong (like in the small intestine), you can end up with SIBO: Small Intestinal Bacterial Overgrowth.

Think of SIBO as fermentation gone wrong. The bacteria feast on your food, producing gas and bloating that can make even a salad feel like a bad idea.


The Small Intestine: Where the Magic (and the Mayhem) Happens

Your small intestine is the unsung hero of digestion. If you stretched it out, it would cover a tennis court. Its job? Absorb nutrients from food. Its challenge? It’s only one cell layer thick, making it extremely vulnerable.

When things like chronic stress, antibiotics, NSAIDs (pain relievers like ibuprofen), alcohol, or processed food damage that lining, it can lead to leaky gut syndrome. That’s when undigested food particles slip into the bloodstream, triggering inflammation, immune confusion, and often worsening digestive symptoms.

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Why Bacteria Balance Matters

Here’s a wild fact: You have more bacterial DNA in your body than human DNA. When those microbes are balanced, they help digest food, make vitamins, regulate your immune system, and even influence mood and hormones.

But when the bad guys outnumber the good ones (dysbiosis), you can get:

  • Bloating and gas after meals
  • Food intolerances
  • Constipation or diarrhea
  • Fatigue and brain fog
  • Skin issues like acne, eczema, or rosacea

Yep—your gut is directly tied to your skin and beauty. Inflammation inside will eventually show up outside.

Related Episode: #175 7 Foods That Are Driving Your Chronic Inflammation


Functional Medicine Testing: Getting to the Bottom of It

Instead of guessing, functional medicine leans on testing to reveal what’s happening in your gut.

  • SIBO Breath Test: Measures hydrogen and methane gases after drinking a sugar solution. High levels = bacterial overgrowth.
  • Comprehensive Stool Testing: Looks at your microbiome balance, inflammation markers, digestion capacity, and even parasites.
  • Food Sensitivity Testing (like MRT): Identifies foods triggering immune reactions.
  • Elimination Diets: If testing isn’t an option, this DIY approach—removing common triggers, then reintroducing them—can reveal a lot.

Healing the Digestive System: A Functional Medicine Roadmap

Restoring gut health isn’t about quick fixes. It’s about creating an environment where healing can happen. Here’s the roadmap:

1. Identify and Remove Triggers

Whether it’s gluten, dairy, corn, or SIBO overgrowth, the first step is removing the irritants keeping your gut inflamed.

2. Starve the Bad, Feed the Good

If SIBO is the culprit, diet shifts (like a low FODMAP or specific carbohydrate diet) plus targeted herbs or, in some cases, antibiotics, can move bacteria out of the small intestine. Then, you repopulate with beneficial bacteria.

3. Rebuild the Gut Lining

Key nutrients and supplements help seal up leaky gut and repair the one-cell-thick barrier:

  • L-glutamine (an amino acid that fuels intestinal cells)
  • Zinc (critical for tissue repair)
  • Vitamin A + D (immune and gut lining support)
  • Mucilaginous Herbs (Slippery Elm, Marshmallow Root, Licorice Root, Aloe Vera) 

4. Rebalance the Microbiome

Adding back beneficial bacteria matters—but timing is key. If you throw probiotics at SIBO too early, you might worsen symptoms. Once balance is restored, probiotics like Saccharomyces boulardii and prebiotic fibers can keep your microbiome thriving.

5. Reduce Stress + Support Digestion

Stress hormones shut down digestion. Simple tools like deep breathing before meals, chewing slowly, and vagus nerve exercises can improve nutrient absorption and reduce bloating.

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The Gut-Skin-Hormone Connection

Here’s where the holistic beauty piece comes in:

  • Skin: Gut inflammation can trigger acne, eczema, rosacea, and premature aging by ramping up systemic inflammation.
  • Hormones: A compromised gut makes it harder to detoxify estrogen, which can lead to estrogen dominance, worsen PMS, irregular cycles, or perimenopause symptoms.
  • Energy + Mood: A happy gut produces neurotransmitters like serotonin and dopamine, which support both energy and emotional resilience.

This is why healing your gut isn’t just about less bloating—it’s about better skin, balanced hormones, and feeling like yourself again.


Personalized Healing Plans: Because One Size Never Fits All

Here’s the thing: two people can have IBS but for totally different reasons. One may have mold toxicity; another, enzyme insufficiency; another, nutrient depletion from years of antacids. That’s why personalized care is key. Functional medicine is not about cookie-cutter diets—it’s about digging into your unique root causes and creating a plan that actually sticks.




Action Steps to Start Healing Now

Even without testing, you can start showing your gut some love today:

  1. Keep a Food-Symptom Journal – Track what you eat and how you feel 2–48 hours later. Patterns will pop up.
  2. Cut Ultra-Processed Foods – They’re packed with additives that inflame your gut.
  3. Stay Hydrated – Adequate water supports digestion, detoxification, and keeps bowels moving.
  4. Move Your Body – Gentle exercise stimulates the gut and reduces stress hormones.
  5. Practice Meal Hygiene – Slow down, chew thoroughly, and put your phone away while eating.

Final Thoughts: Your Digestive System, Your Freedom

Digestive issues might feel overwhelming, but here’s the truth: your gut can heal. With the right testing, a root-cause approach, and daily habits that support your microbiome, you can calm the bloating, end the bathroom anxiety, and reclaim your energy and confidence.

Your gut isn’t just about digestion—it’s your foundation for vibrant health, glowing skin, balanced hormones, and a life where you feel free to show up fully.

So if your gut has been running the show lately, consider this your invitation to take back the mic. With the right support, healing and freedom really are possible.

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