fatigue

The Gut and Emotions Connection: Why Symptoms Are Often Messages, Not Mistakes

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Many women live with symptoms like bloating, cravings, fatigue, or weight changes, and end up blaming themselves. They assume they should eat better, have more discipline or willpower, or just push through it.

But these symptoms are not random and are not character flaws.

In functional nutrition and gut health coaching, one thing becomes clear very quickly:
Your gut and emotions are not separate systems. They are in constant conversation.

This gut and emotions connection is one of the most overlooked reasons women continue to feel unwell, even when they’re trying their best.

Recently, well-being coach Michaela and I collaborated to explore how your emotional state and your digestive system influence one another.

Below is a shortened version of our full collaborative article.

To read the full post in more depth, see the link at the end.

Why symptoms show up together

If you're dealing with chronic bloating, unpredictable cravings, exhaustion, or weight fluctuations, there's a reason these symptoms tend to cluster.

Your gut, nervous system, and hormones are intertwined.

When one shifts, the others respond, sometimes dramatically.

Bloating

Often reflects digestive sluggishness, microbial imbalance, food reactions, or stress-driven changes in gut motility. Stress-based bloating behaves differently from microbiome-related bloating, something many women don't realize.

Cravings & emotional eating

Blood sugar swings, cortisol spikes, neurotransmitter imbalances, and emotional stress all contribute. The gut and emotions connection plays a major role in how, why, and when cravings appear.

Fatigue

Low energy is frequently linked to nutrient absorption issues, inflammation, mitochondrial stress, or hormonal changes, all of which are influenced by gut health.

Weight fluctuations

Hormones, gut bacteria, stress patterns, and emotional coping strategies each affect metabolism far more than simple calorie math.

The Gut–Emotion Connection: Why You Feel Bloated, Tired & Craving Sugar

The gut and emotions connection (a closer look)

Your gut does much more than digest food:

  • It produces neurotransmitters like serotonin and GABA

  • It communicates with the brain through the vagus nerve

  • It influences cortisol, estrogen, thyroid hormones, and blood sugar

  • It reacts instantly to emotional states

This means:

Your emotional landscape directly affects digestion, motility, and food reactions.

Your gut chemistry shapes mood, cravings, energy, and emotional resilience.

When the connection becomes dysregulated, symptoms appear, sometimes subtly, sometimes loudly.

Root causes behind the symptoms

Both emotional patterns and biological imbalances tend to create the same symptom picture.

Common contributors include:

  • microbiome imbalance

  • low stomach acid or digestive insufficiency

  • chronic inflammation

  • cortisol dysregulation

  • nervous system overload

  • nutrient deficiencies

  • hormonal shifts influenced by gut health

These don’t occur in isolation. They form patterns, and those patterns express themselves as the symptoms women know so well.

Healing requires both: the body and the emotional world

A gut-healing diet alone cannot resolve emotional triggers.

Mindset coaching alone cannot repair dysbiosis or gut motility issues.

Sustainable healing happens when you support:

1. Biology

  • structured meals

  • balanced plates for blood sugar stability

  • anti-inflammatory nourishment

  • optimized digestion and motility

  • nutrient and microbiome support

2. Behavior

  • how you eat (your pace, tension, presence)

  • identifying emotional versus physical hunger

  • interrupting autopilot patterns

3. Beliefs & emotional safety

  • addressing perfectionism

  • reducing self-pressure

  • regulating the nervous system

  • rebuilding trust with your body

This is where the gut and emotions connection becomes truly transformative, when you support both sides at the same time.

This post is for informational purposes only and not intended to diagnose, treat, or cure any medical condition. Please consult your healthcare provider before making any medical or dietary changes.

Read the full article

This is a condensed version of the full collaborative piece Michaela and I created.

👉 Read the complete and detailed version on Michaela’s website

In her version, you’ll find deeper insights into:

  • stress-based vs. microbiome-based bloating

  • emotional eating biology

  • the gut–hormone–stress loop

  • functional testing options

  • the 3-level healing model

  • practical tools for gut + emotional regulation

If you’ve been struggling with symptoms that don’t make sense, this full article will help you finally see the bigger picture.

Read the full article

Authors:

Michaela is a certified well-being

Michaela Czernekova, Ph.D.

Michaela is a certified wellbeing coach and nutrition consultant with a Ph.D. in cell biology. She combines evidence-based knowledge, research background with a compassionate coaching approach.

She specializes in emotional eating, stress management, and overall well-being, helping clients understand their patterns, create healthier habits, and build a balanced relationship with food and themselves. If you would like to find more emotional balance and inner peace, check out her book here: www.michaelaczernekova.com

Check out her book here
Alexandra Ress

Alexandra Ress-Sarkadi

Alexandra is a Functional Medicine Certified Health Coach & Holistic Nutritionist specializing in IBS, SIBO, and gut health. She helps her clients identify root causes through functional testing, restore gut function, support their bodies holistically to regain control, and enjoy food freedom. 

Book a free SIBO & Gut Assessment call here

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SIBO vs IBS: Key Differences, Symptoms, and Treatments Explained

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You're tired. You are tired of feeling bloated, tired of not knowing what's causing that constant discomfort, and tired of trying new diets only to see little or no improvement. Sound familiar?

If you've been stuck in this cycle of gastrointestinal turmoil, you've likely come across two terms: SIBO (aka Small Intestinal Bacterial Overgrowth) and IBS (Irritable Bowel Syndrome). They're often confused with one another, and it's easy to see why: both conditions involve gut issues, and the symptoms can feel like a constant guessing game.

So, how can you tell if it's SIBO or IBS that's wreaking havoc in your gut?

In this blog post, we'll dive into the differences and similarities between these two conditions—SIBO vs IBS—so you can better understand your symptoms, seek the right diagnosis, and find the treatment that finally brings relief. We'll also look into why IBS often gets criticized as a "catch-all" label and how you can advocate for a better understanding of your gut health.

What is SIBO?

Small Intestinal Bacterial Overgrowth (SIBO) is a condition in which an excessive amount or abnormal type of bacteria are present in the small intestine, where their numbers should be relatively low compared to the large intestine.

See, your small intestine isn’t meant to host a large number of bacteria—that’s more the colon’s job. Your colon is the place where you can find the gut microbiome (a community of trillions of microorganisms).

In SIBO, bacteria that should stay in the large intestine migrate up into the small intestine, causing interference with normal digestion and absorption of food by fermenting carbohydrates and fibers and creating gases (methane, hydrogen, hydrogen sulfide).

How does it feel to live with SIBO?

Imagine having too many guests at a dinner party: there’s no room to breathe, everyone’s stepping on each other’s toes, and nothing works as it should.

This overcrowding leads to the fermentation of your food in the wrong part of the gut, resulting in:

  • Chronic bloating that tends to get worse as the day goes by,
  • Changed bowel movements involving constipation and/or diarrhea or alternating bowel movements,
  • Abdominal pain,
  • Nausea,
  • Burping,
  • Fatigue,
  • Brain fog,
  • Muscle or joint pain,
  • Skin issues (acne, rosacea, eczema)
  • Unexplained weight loss or weight gain,

But it can also impact other areas of the body. (1)

Interestingly, SIBO often follows another gut-altering event, like food poisoning or surgery, which disrupts the balance of your gut bacteria. Fibers and probiotics—usually gut heroes—can worsen the condition by providing extra fuel for the overgrown bacteria to feast on.

What is IBS?

Did you know that more than 60 million people have Irritable Bowel Syndrome (IBS), and 70% of them are women? (2)

IBS is a bit more elusive. It’s a functional GI condition defined by a collection of chronic gut symptoms, but there’s no clear-cut cause, making it somewhat of a medical mystery.

IBS is commonly diagnosed based on a specific set of criteria known as the Rome IV Criteria, which include recurrent symptoms like abdominal pain, bloating, constipation, diarrhea, or a combination of both, for at least three months. (3)

How does it feel to have IBS?

Imagine being in a car with a faulty GPS—some days, you might end up at your destination, but other days, you’re stuck in traffic or stranded on a dead-end street. IBS feels like that: the gut’s regular motility goes haywire, leading to unpredictable and uncomfortable outcomes.

The brain-gut connection plays a big role in IBS, with stress and heightened sensory responses making symptoms worse. (4)

IBS is categorized by the following categories:

  • IBS with predominant constipation (IBS-C)
  • IBS with predominant diarrhea (IBS-D)
  • IBS with mixed bowel habits (IBS-M)

SIBO vs IBS: similarities and differences

At first glance, SIBO and IBS seem similar —both share many of the same symptoms, which can make it difficult to tell them apart.

However, a closer look reveals important distinctions in the underlying mechanisms, as well as how the symptoms manifest.

Symptom overlap

When comparing SIBO vs IBS, the overlap in symptoms is undeniable.

Both conditions can cause:

  • Bloating
  • Abdominal pain, cramping
  • Constipation and/or diarrhea
  • Fatigue
  • Food intolerances

However, the way these symptoms manifest differs between the two conditions.

For example, in SIBO, there are a few tell signs, like bloating, which tends to worsen as the day progresses, and meals rich in fiber or taking probiotics can exacerbate the discomfort.

In contrast, bloating in IBS can happen at any time, and fiber is often recommended as a helpful addition.

SIBO vs IBS Key Differences, Symptoms

Main differences

Causes:

While multiple factors influence both SIBO and IBS, SIBO is specifically characterized by bacterial overgrowth in the small intestine, where these microbes shouldn't be present in large numbers. This overgrowth leads to the fermentation of undigested food, which causes gas, bloating, and discomfort.

However, the underlying reasons for SIBO can also be many things, from impaired gut motility through infections to structural problems.

IBS, on the other hand, is more ambiguous. In contrast, IBS is more of a functional gastrointestinal disorder—it involves issues with how the gut functions rather than an actual bacterial overgrowth in a specific area.

IBS can be driven by many causes, such as gut-brain axis dysfunction, hypersensitivity of the gut, altered motility, and even imbalances in the gut microbiome (known as dysbiosis), without necessarily involving bacterial overgrowth in the small intestine.

However, it is important to mention that studies show up to 80% of IBS cases may, in fact, be related to SIBO. (5)

This suggests that, in many cases, SIBO might be an underlying cause of IBS symptoms. However, it's important to remember that not all IBS cases are caused by SIBO.

Diagnosis:

SIBO is commonly diagnosed using a lactulose or glucose breath test (link to breath test blog), which measures the gases (hydrogen, methane, and, in some cases, hydrogen sulfide) produced by bacteria or archaea in your small intestine. A positive test result confirms not just SIBO but it helps determine the level of overgrowth and the type of SIBO.

IBS, on the other hand, is often diagnosed by exclusion after ruling out other conditions, which can be frustrating for many patients. The Rome IV Criteria help guide the diagnosis, and patients are typically diagnosed based on symptoms that have been present for at least three months. IBS may also require stool tests or colonoscopies to rule out conditions like inflammatory bowel disease or celiac disease.

However, there is also a diagnostic test for certain people with IBS. The IBS-Smart test is available on the market to diagnose IBS with predominant diarrhea (IBS-D) and mixed symptoms (IBS-M).

This blood testing looks for anti-CdtB and anti-vinculin antibodies, the markers of a food poisoning event. These antibodies can attack the gut's nerves and impair the gut's cleaning wave. (6)

Nutrient absorption:

SIBO can interfere with nutrient absorption, leading to deficiencies in vitamins and minerals (especially deficiency in fat-soluble vitamins such as Vitamin A, D, and E, and also negatively impacting vitamin B12 and iron levels) (7).

In contrast, nutrient absorption in IBS is generally normal unless it's combined with another condition like celiac disease.

Probiotic response:

Another major difference is how each condition responds to probiotics and dietary fibers. Probiotics, often touted as a gut health remedy, may worsen symptoms of SIBO. This is because the overgrown bacteria feed on these probiotics, leading to more gas and bloating.

In contrast, many people with IBS can benefit from the right probiotics or fiber supplements.

Let’s look at the treatment options: SIBO vs IBS

The treatment plans for SIBO vs IBS vary significantly, largely because the causes of each condition are so different.

Treating SIBO

Treatment for SIBO primarily focuses on reducing bacterial overgrowth and addressing underlying causes like gut motility issues.

The main strategies include:

  • Antibiotics or antimicrobials: Common treatments include rifaximin, often combined with another antibiotic (in case of methane and hydrogen sulfide gas), or herbal antimicrobials that target bacterial overgrowth in the small intestine. (1)
  • Dietary changes: Many people with SIBO find relief through a certain SIBO diet, such as the low-FODMAP diet, SIBO Bi-phasic, or the low fermentation diet, which restrict the types of carbohydrates that can fuel bacterial overgrowth.
  • Prokinetics: These are medications or supplements that help improve gut motility and prevent bacteria from lingering in the small intestine.
  • Post-treatment care: Relapse is fairly common with SIBO, unfortunately. Studies show that about 45% of patients experience recurrence after antibiotic treatment (8), so long-term care might involve dietary and lifestyle changes and addressing the root causes.

Read the complete guide on how to heal your gut from SIBO with a natural approach. 

Treating IBS

Treatment for IBS is often more varied and personalized since its exact cause isn’t clear-cut.

Options include:

  • Dietary adjustments: The low-FODMAP diet is also commonly recommended for IBS, showing great symptom relief of bloating, gas, and pain (9), while some patients find relief by eliminating specific trigger foods like dairy or gluten.
  • Medications: Depending on whether you have IBS with constipation (IBS-C) or IBS with diarrhea (IBS-D), doctors may prescribe medications like laxatives, anti-diarrheal, or antispasmodics to manage symptoms.
  • Psychological approaches: Since stress and anxiety can exacerbate IBS, therapies like cognitive behavioral therapy (CBT) or gut-directed hypnotherapy (like Nerva) have shown promise in helping manage symptoms.
  • Probiotics: While probiotics can sometimes aggravate SIBO, they’re often beneficial for IBS patients in supporting healthy gut bacteria balance.

Why is IBS criticized as a label?

One of the biggest frustrations with an IBS diagnosis is that it can feel like a "wastebasket diagnosis"—a label given when doctors can't figure out exactly what's wrong.

In fact, some researchers believe that IBS is often misdiagnosed when in reality, patients may have an underlying condition like SIBO or even mild inflammatory bowel disease.

This misdiagnosis can lead to a frustrating cycle of trying different diets, medications, and supplements without ever addressing the root cause.

Conclusion on SIBO vs IBS

The road to understanding your gut health is rarely straightforward.

When it comes to SIBO vs IBS, knowing the key differences between these two conditions is essential in navigating your symptoms and finding a treatment plan that works.

While SIBO involves an overgrowth of bacteria that can be tested for and treated directly, IBS is a broader, more complex condition that often requires a multi-faceted approach, including diet, stress management, lifestyle changes, and sometimes medication.

If you’ve been diagnosed with IBS but feel like your treatment isn’t working, consider asking your doctor about SIBO testing.

Understanding the true source of your symptoms is the first step to reclaiming your gut health and your life.

This post is only for informational purposes and is not meant to diagnose, treat, or cure any disease. I recommend always consulting your healthcare practitioner before trying any treatment or dietary changes.

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SIBO and Thyroid dysfunctions

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Gut SIBO thyroid dysfunctions hypothyroidismAre you suffering from symptoms such as fatigue, brain fog, mood swings, dry skin, slow bowel movement, and even weight gain? These could also be a sign of thyroid dysfunction. (1, 2, 3, 4, 5, 6) Your thyroid is responsible for controlling your metabolic processes. If it is under-functioning (in the case of hypothyroidism), it pushes the brake pedal and slows down the body's metabolic processes. In the case of hyperthyroidism, it pushes the gas pedal and makes the process run faster.

Even though you may have thyroid dysfunction, your thyroid-like symptoms can actually stem from your gut. On the other hand, low functioning thyroid could also be a risk factor for Small Intestinal Bacterial Overgrowth (SIBO). It means that SIBO can lead to a hypothyroidism state, but hypothyroidism can also result in bacterial overgrowth.

The gut-thyroid connection

Some studies have found that thyroid symptoms improved after treating the gut. These gut issues can come from Helicobacter pylori (7,8), parasites (9), fungal infection (Candida) (10), SIBO (11), or food intolerances (12), etc.

Studies estimate that around 30% of people with hypothyroidism have low stomach acid (13). Stomach acid is essential to kill pathogens and prevent the overgrowth of bacteria. If this protective mechanism fails, then it can easily lead to SIBO. (14) This is why using stomach acid blockers (Proton-pump inhibitors) unnecessarily can be problematic and may also lead to SIBO. Here you can read more about the types of SIBO.

The other reason is that overgrowth of bad bacteria can lead to issues with the conversion of thyroid hormones, namely T4 (inactive form) to T3 (active form). (15) Much of the thyroid hormone is released by the thyroid gland in the inactive type known as T4 (thyroxine), but it must be converted to an active form known as T3 (triiodothyronine) for the cells to use it. (16) Around 20% of T4 can be converted to T3 in the gut by good gut bacteria.

But most of the conversion is done by the liver, which can also be sluggish for many reasons. A sluggish liver and gallbladder cannot remove hormones efficiently, such as estrogen. Elevated estrogen levels can also negatively influence the conversion rate of thyroid hormones. (17)

The other issue can be when T4 converts to reverse T3 (rT3), the inactive form. A higher level of reverse T3 can be produced if someone went through a major life event, a trauma (emotional or physical stress like a surgery), or having chronic stress (illness, inflammation). (18,19) In some cases, other factors such as diet, not just a diet high in sugars and processed foods, but also a ketogenic or very low carb diet, can cause elevated levels of rT3. (20, 21)

So making sure that you have a well-functioning gut and liver, the gallbladder is vital to ensure proper conversion of thyroid hormones.

The immune system-thyroid connection

There are 70% of the body's immune cells located in the gut. The immune response in this part of the body is called GALT, or gut-associated lymphoid tissue. The GALT contains several forms of immune cells, such as T and B cells, that detect and respond to antigens as potential threats that trigger immune system reactions.

Problems arise when any one of these intestinal barriers is weakened. When the small intestine's tight junctions loosen (in case of "leaky gut syndrome"), undigested food particles, microorganisms, toxins, or larger proteins enter the bloodstream. The immune system sees these particles as unwanted intruders and starts an inflammation process to rid of them. Leaky gut can be one of the underlying causes of autoimmune diseases, such as Hashimoto-Thyroiditis, an autoimmune form of hypothyroidism. If you have a leaky gut, the immune system can keep attacking the thyroid and cause continued problems. (22, 23)

What might help to support your body?

Focusing on gut health is an essential part of any treatment process as it is also connected to your immune system and thyroid autoimmunity, and thyroid functions. But concentrating on the thyroid function is also crucial.

If you are experiencing symptoms of thyroid dysfunction and SIBO, you can do the following steps:

  1. Do the necessary testing to find out what the issue is behind your symptoms: ask for a SIBO breath test and a full thyroid panel from your Practitioner
  2. Taking thyroid medication may help with motility and considering eliminating SIBO or other infections if present
  3. Choose a customized diet that eliminates inflammatory foods such as sugar, processed foods, gluten, refined carbohydrates, refined oils, artificial sweeteners, etc.
  4. Eat a whole food diet – including organic meats, vegetables, fruits, nuts, seeds based on your tolerance
  5. Apply lifestyle changes that help you manage your daily stress
  6. Take intestinal lining healing nutrients, boost motility

 

 

*This post is only for informational purposes; and not meant to diagnose, or treat any disease. I advise consulting with your healthcare practitioner regarding any treatment options or dietary changes.

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