Over 2,000 years ago, Hippocrates declared that “all disease begins in the gut.” Today, science is finally catching up and nowhere is this more obvious than in the mystery of leaky gut.
Also known as intestinal permeability, leaky gut is a condition where the gut lining becomes more porous than it should be, allowing things like undigested food particles, bacteria, and endotoxins to sneak into the bloodstream. Think of your gut wall like a coffee filter. When it’s working properly, it lets through only what your body needs. But when the filter gets holes? You end up with sludge in your coffee aka inflammation in your body.
Let’s break down what’s happening inside this incredible, complex system and why a leaky gut could be the culprit behind everything from belly bloat to weight gain to brain fog.
Your small intestine isn’t just digesting your food, it’s talking to your brain, your immune system, and your hormones. It’s home to the enteric nervous system, a.k.a. your “second brain,” and produces neurotransmitters like serotonin, dopamine, and GABA. This communication superhighway between your gut and brain is known as the gut-brain axis and when it’s inflamed, everything from your mood to your metabolism can suffer.
One of the biggest triggers of leaky gut is excess fermentation from candida overgrowth. Candida is a form of yeast that is a commensal member of our native microbiome. It consumes carbohydrates from our diet by fermenting them … no different from baking bread or brewing beer. It readily goes into overdrive when exposed to a high carbohydrate diet. The excessive fermentation creates a dysbiotic (imbalanced) bio-terrain that inflames the gut lining and promotes hyperpermeability. If this becomes chronic, then it can extend into the small intestine. Known as SIBO (Small Intestinal Bacterial Overgrowth), a condition where bacteria that should stay in the large intestine start colonizing the small intestine. But SIBO and candida aren’t the only villains. Other causes of leaky gut include:
When the gut lining is compromised, it sets off a cascade of immune responses. One of the body’s unexpected first responders? Visceral fat.
Visceral fat, the deep abdominal fat that surrounds your organs, actually plays a role in immune surveillance. So when leaky gut allows bacterial toxins (specifically lipopolysaccharides or LPS) into your bloodstream, visceral fat responds like a mini immune headquarters.
But here’s the kicker: this immune activity can cause visceral fat to grow, and more visceral fat means more inflammation, abnormal hunger signals, and eventually, metabolic dysfunction. This is known as metabolic endotoxemia: a chronic, low-grade inflammation that can increase your risk of insulin resistance, heart disease, and other metabolic disorders.
Your gut is also home to trillions of bacteria that make up your microbiome. These tiny creatures aren’t just passive passengers, they can influence your:
When your gut bacteria are balanced, they support insulin sensitivity, produce calming neurotransmitters, and help regulate your weight. But when they’re out of whack, in a state called dysbiosis, you may feel constantly hungry, fatigued, foggy, or bloated.
Fun fact? Your gut bacteria even follow a circadian rhythm. They have day and night shifts, releasing different compounds at different times to support digestion and detox. Respecting this rhythm, like avoiding late-night snacking, can support gut repair and overall metabolic health.
Cut the offenders – Minimise ultra-processed foods, alcohol, and NSAIDs.
Rebuild with real food – Prioritise whole foods and include some fibre
Balance macros – 40% carbohydrate, 40% protein and 20% fat
Support digestion – Consider digestive enzymes or bitter herbs to boost stomach acid and bile flow.
Manage stress – Your nervous system plays a huge role in gut permeability.
Strengthen the barrier – Nutrients like zinc, glutamine, vitamin A and collagen help repair the intestinal lining.
Balance your bugs – Targeted probiotics and regular cleansing help restore a healthy microbiome.
Leaky gut isn’t just a digestive issue, it’s a whole-body issue. From inflammation and fatigue to weight gain and mood swings, so many seemingly unrelated symptoms can trace back to a compromised gut lining.
But that’s also the magic: healing your gut can trigger a ripple effect of better health, energy, and clarity.
So next time you reach for a meal, remember you’re not just feeding yourself, you’re feeding your microbial empire.
Is your gut trying to tell you something? Tune in, nourish wisely, and trust your gut, it might just be the smartest part of you.
Links below to helpful resources:
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Kimballe Robyzen is an experienced Naturopath specialising in women’s health, allergies, immune, gut and mental health. Kimballe frequently works with interstate and overseas clients via Skype, Zoom, phone and/or email. Kimballe’s clinical approach is well suited to supporting you by distance, offering access to personalised health care to those challenged by distance and/or time.
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