Your gut isn’t just for digestion—it’s a central hub for your immune system, nutrient absorption, and overall well-being. When your gut lining becomes compromised, it can allow unwanted particles to “leak” into your bloodstream, sparking inflammation and a cascade of symptoms. This is commonly referred to as leaky gut.
At Seeking Health, founded by Dr. Ben Lynch, our mission is to help you understand the science behind your body. This guide will walk you through the basics of leaky gut, how it affects your health, and what you can do to restore balance.
What Is a Leaky Gut?
A leaky gut, or increased intestinal permeability, occurs when the tight junctions in your intestinal lining weaken. Instead of keeping food particles, toxins, and microbes contained, they slip into your bloodstream, where they trigger immune reactions and systemic inflammation.
Why Is a Leaky Gut Bad for You?
When your gut barrier is compromised, your body sees foreign particles as threats. This can:
- Contribute to food sensitivities
- Drive inflammation throughout the body
- Weaken your immune system
- Lead to nutrient malabsorption
- Increase the risk of chronic conditions
What Causes Leaky Gut?
Common contributors include:
- Poor diet – High in processed foods, refined sugars, and unhealthy fats
- Chronic stress – Weakens the gut lining and alters digestion
- Medications – Overuse of NSAIDs or antibiotics can disrupt gut balance
- Imbalances in gut bacteria – Dysbiosis can erode gut lining integrity
- Alcohol and toxins – Irritate and damage intestinal cells
What Are Leaky Gut Symptoms?
Leaky gut symptoms are often widespread and can mimic other health issues:
- Bloating, gas, or irregular bowel movements
- Food sensitivities or intolerances
- Fatigue and brain fog
- Skin issues like acne, eczema, or rashes
- Joint discomfort or inflammation
- Frequent colds or low immunity
What Three Foods Cause a Leaky Gut?
While triggers vary by individual, three common culprits are:
- Gluten – Can increase zonulin, a protein linked to gut permeability
- Refined sugar – Feeds harmful gut bacteria and yeast
- Processed seed oils (like soybean or corn oil) – Promote inflammation and damage cell membranes
Even though these three foods can cause issues for many people, everyone is different and reacts to foods in their own way. What works well for one person might not work for someone else. A healthcare professional can help you figure out how these foods affect your body.
But don’t worry—changing your diet doesn’t mean you have to give up your favorite foods. It just means finding a balanced approach. Your healthcare professional can help determine how these foods affect your gut.
How Is Leaky Gut Diagnosed?
There isn’t one single test for leaky gut, but health providers may use:
- A clinical evaluation
- Microbiome testing
- Intestinal permeability tests (lactulose/mannitol challenge)
- Zonulin blood tests
- Comprehensive stool analysis to assess gut bacteria, inflammation, and digestive health
How Do You Fix a Leaky Gut?
Healing the gut takes a comprehensive approach:
- Remove irritants – Reduce processed foods, alcohol, and common triggers like gluten and sugar.
- Replenish with nutrients – Use gut-supportive nutrients like L-glutamine, zinc, and vitamin D.†
- Rebalance the microbiome – Add probiotics and fermented foods.
- Repair the gut lining – Supplements like Seeking Health’s ProBiota HistaminX and Digestive Enzymes can help maintain balance.†
What Dietary and Lifestyle Changes Support Gut Health?
- Eat whole, nutrient-rich foods – Vegetables, quality protein, healthy fats
- Incorporate fermented foods – Sauerkraut, kimchi, kefir, yogurt
- Manage stress – Meditation, yoga, and deep breathing lower gut stress hormones
- Stay hydrated – Water helps maintain gut barrier function
- Prioritize sleep – Restorative sleep supports digestion and repair
Support a Healthy Gut
Your gut is the gateway to your overall health. When it’s compromised, your whole body feels the effects. The good news is—with the right nutrition, lifestyle, and targeted supplements—you can support and strengthen your gut barrier.†
Not sure where to begin? Kickstart your wellness journey with our Gut Health Bundle, which provides the top 4 best-selling gut health supportive supplements to start taking care of your gut health today.† It includes:
Gut Health Bundle Comparison
| Supplement | Primary Purpose | Key Benefits | Best For |
|---|---|---|---|
| DAO Enzyme | Histamine metabolism support† | ✓ Quick-acting DAO enzymes† ✓ Supports healthy metabolization of histamine from food† ✓ Contains patented DAOgest® ✓ Releases in small intestine |
Those wishing to support occasional bloating and gas from high histamine food consumption, healthy skin and histamine-related responses† |
| ProBiota | Histamine-friendly probiotic support† | ✓ Excludes histamine-producing species ✓ Optimizes DAO enzyme workload† ✓ Supports gut microbiome balance† ✓ Formulated for healthy histamine response† |
Those with slower DAO enzymes or histamine sensitivity who want probiotic support† |
| Bile Nutrients | Fat digestion and bile support† | ✓ Supports healthy fat digestion† ✓ Helps support small intestinal bacteria balance† ✓ Supports health nutrient absorption† ✓ Supports digestive comfort† |
Those with slow gallbladder function or who have had gallbladder removal and want to support health digestion. † |
| Gut Nutrients | Comprehensive digestive and immune system support† | ✓ 1.5g L-glutamine per serving ✓ 1g citrus pectin for healthy bowel support† ✓ Herb and nutrient blend ✓ Supports healthy GI barrier and immune function† |
Those seeking gut lining support and support for healthy digestion† |
DAO Enzyme
You need quick-acting DAO enzymes to help your body metabolize histamine and keep histamine levels and inflammation in check. If your DAO enzyme isn't working well, you may experience several frustrating symptoms, from bloating and gas to eczema or even nose bleeds. DAO Enzyme provides the patented, lab-tested, and pure enzyme called DAOgest®. Once you take a small capsule of DAO Enzyme, it breaks open in your small intestine, releasing the DAO enzyme. This enzyme immediately begins digesting histamine from the foods you eat, your gut's immune system, and your microbiome, alleviating the burden on your body.†
ProBiota HistaminX
Some probiotics make you feel worse because they produce histamines, which can raise histamine levels—especially if you have slower-than-average DAO enzymes. ProBiota HistaminX was designed to help lessen your DAO enzyme's workload by excluding species that produce histamine, like Streptococcus, L. fermentum, L. casei, and L. bulgaricus.†
Bile Nutrients
Your gallbladder produces bile, which acts as a detergent to break down large fat globules so they can be absorbed into the intestines. If you have a slow gallbladder or have had it removed, bile production may decrease, leading to digestive discomfort. Bile Nutrients supports normal fat digestion and helps maintain balance in your small intestinal bacteria for optimal digestive comfort.†
Gut Nutrients
Supporting healthy digestion and nutrient absorption is one of the most effective things you can do for your immune function. Gut Nutrients includes a powerful blend of herbs and nutrients that synergistically support healthy digestion, GI barrier, and immune system function. It also contains It also contains 1.5 grams of L-glutamine per 2-scoop serving, a vital amino acid for supporting a healthy gut lining and energy levels, and 1 gram of citrus pectin to provide bulk to support healthy bowel movements.†
Consult with your healthcare professional before using any of these supplements. Do not use them if the inner tamper seal is damaged.
†These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Always talk to your doctor before considering the use of this product, especially if you have health conditions or diseases that need to be addressed.
Frequently Asked Questions
What is leaky gut?
Leaky gut, or increased intestinal permeability, occurs when tight junctions in your intestinal lining weaken. This allows food particles, toxins, and microbes to slip into your bloodstream, triggering immune reactions and systemic inflammation throughout your body.
What are common leaky gut symptoms?
Common symptoms include bloating, gas, irregular bowel movements, food sensitivities, fatigue, brain fog, skin issues like acne or eczema, joint discomfort, and frequent colds. These symptoms are widespread and can mimic other health conditions.
What foods cause leaky gut?
Three common culprits are gluten (increases zonulin linked to gut permeability), refined sugar (feeds harmful gut bacteria), and processed seed oils like soybean or corn oil (promote inflammation). However, individual triggers vary, so consult a healthcare professional.
How is leaky gut diagnosed in 2026?
Healthcare providers use clinical evaluation, microbiome testing, intestinal permeability tests (lactulose/mannitol challenge), zonulin blood tests, and comprehensive stool analysis to assess gut bacteria, inflammation, and digestive health. No single definitive test exists.
How do you fix leaky gut?
Healing requires removing irritants (processed foods, alcohol, gluten, sugar), replenishing with gut-supportive nutrients (L-glutamine, zinc, vitamin D), rebalancing the microbiome with probiotics and fermented foods, and repairing the gut lining with targeted supplements.†
What lifestyle changes support gut health?
Eat whole nutrient-rich foods (vegetables, quality protein, healthy fats), incorporate fermented foods (sauerkraut, kimchi, kefir), manage stress through meditation and yoga, stay hydrated with water, and prioritize restorative sleep for digestion and repair.