What are the common pitfalls and how to avoid them?
A few years ago, a woman told me she had “tried everything” for her digestion.
She had gone gluten-free.
Then dairy-free.
Then low-carb.
Then high-fibre.
Then plant-based.
Her cupboards were full of special flours, powders, and supplements. Her fridge was full of labelled containers. But she was still bloated, tired, and confused.
The problem wasn’t that she wasn’t trying.
The problem was that somewhere along the way, cooking for gut health had become complicated and disconnected from the way humans traditionally prepared food.
Cooking for gut health is not about perfection. It’s not about restriction. And it’s certainly not about eating laboratory-designed substitutes.
Often, it’s about avoiding a few very common mistakes.
Let’s walk through them.
Mistake #1: Going “gluten-free” but relying on processed substitutes
Many people assume removing gluten automatically supports the gut. For individuals with coeliac disease, of course, strict avoidance is essential. However, for many others, the issue isn’t gluten itself; it’s the modern processing methods.
Highly processed gluten-free breads and snacks are often made with:
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refined starches
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gums and thickeners
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industrial seed oils
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added sugars
These ingredients can reduce microbial diversity and irritate the digestive system.
Traditional cultures did not eat rapidly rising white bread. They ate:
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long-fermented sourdough
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ancient grains such as einkorn or rye
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breads prepared slowly, allowing natural fermentation to pre-digest gluten and phytic acid
Long fermentation has been shown to reduce gluten content and improve digestibility while supporting beneficial bacteria.
The better approach:
If tolerated, choose properly fermented sourdough or traditional grains. If avoiding gluten, prioritise whole-food alternatives rather than processed replacements.
Mistake #2: Overdoing raw vegetables and salads
Salads feel virtuous. But raw food is not automatically gentle.
Raw vegetables contain:
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tough plant fibres
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natural defence compounds
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higher microbial loads
For someone with a sensitive gut, large amounts of raw food can worsen bloating and discomfort.
Traditional cuisines are rarely centred on large bowls of raw vegetables year-round. Instead, vegetables were:
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fermented
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stewed
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roasted
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slow-cooked in broth or fat
Cooking breaks down fibres and increases nutrient bioavailability.
The better approach:
Favour cooked vegetables most of the time, especially in colder months or if digestion is fragile. Add small amounts of fermented vegetables rather than large raw salads.
Mistake #3: Fear of animal fats
For decades, people were told to replace butter and tallow with vegetable oils. Unfortunately, many seed oils are high in omega-6 polyunsaturated fats that oxidise easily and may promote inflammation.
The gut lining depends on stable fats for:
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cell membrane integrity
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bile production
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nutrient absorption
Traditional fats such as:
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butter
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ghee
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tallow
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duck fat
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extra virgin olive oil
are more stable for cooking and support metabolic health.
Studies suggest excessive omega-6 intake can alter gut microbiota composition and promote inflammatory signalling.
The better approach:
Cook with traditional fats. Avoid industrial seed oils wherever possible.
Mistake #4: Forgetting bone broth
Stock cubes may be convenient, but they cannot replace slow-simmered bone broth.
Bone broth contains:
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collagen
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gelatin
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glycine
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proline
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minerals
These compounds support the intestinal lining and may help maintain gut barrier function.
Animal studies and emerging human research show that glycine and gelatin-rich broths may reduce intestinal permeability and inflammation.
Traditional kitchens used the whole animal, not just muscle meat.
The better approach:
Keep broth in your freezer. Use it to cook rice, soups, sauces, and stews.
Mistake #5: Overloading fibre too quickly
Fibre feeds beneficial bacteria, but too much, too quickly, can cause gas, bloating, and discomfort.
The microbiome adapts gradually. Sudden increases in resistant starch, raw fibre, or prebiotic powders can overwhelm an already imbalanced system.
Research consistently shows that microbial diversity improves with dietary diversity, not sudden fibre extremes.
The better approach:
Increase fibre slowly through whole foods:
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root vegetables
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cooked onions and leeks
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carrots
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small amounts of fermented vegetables
Consistency matters more than intensity.
Mistake #6: Treating fermented foods like medicine
Fermented foods are powerful. They introduce beneficial microbes and bioactive compounds. But more is not always better.
Too much fermentation too quickly can:
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trigger bloating
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worsen symptoms in sensitive individuals
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overwhelm those with small intestinal overgrowth
Traditional cultures consumed fermented foods as condiments, not in large bowls.
The better approach:
Start with a teaspoon alongside meals. Build gradually.
Mistake: Ignoring seasonal rhythm
The microbiome shifts with seasons. Research in traditional populations shows gut bacteria composition changes according to seasonal food availability.
Modern eating ignores this rhythm: salads in winter, heavy stews in summer, strawberries in December.
Seasonal cooking naturally:
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supports microbial diversity
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aligns digestion with climate
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reduces digestive stress
The better approach:
Warm, slow-cooked meals in winter.
More fresh foods and herbs in summer.
Gentle transitions in spring and autumn.
The Bigger Picture
Cooking for gut health is not about chasing trends. It is about:
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traditional preparation methods
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seasonal eating
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stable fats
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whole foods
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slow fermentation
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mineral-rich broths
Our ancestors did not measure fibre grams or buy gut supplements. They simmered bones. They fermented vegetables. They cooked slowly. They ate what the season provided.
The gut thrives on rhythm, simplicity, and nourishment, not extremes.
If your kitchen feels calm and traditional, your microbiome often follows.
References
Research supporting the principles discussed above includes:
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De Angelis, M., et al. (2006). Sourdough fermentation reduces gluten toxicity and improves digestibility. Applied and Environmental Microbiology.
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David, L. A., et al. (2014). Diet rapidly and reproducibly alters the human gut microbiome. Nature.
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Smits, S. A., et al. (2017). Seasonal cycling in the gut microbiome of the Hadza hunter-gatherers. Science.
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Schnorr, S. L., et al. (2014). Gut microbiome of the Hadza hunter-gatherers. Nature Communications.
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Kaliannan, K., et al. (2015). Omega-6 fatty acids and gut microbiome-driven inflammation. Scientific Reports.
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Chen, J., et al. (2017). Glycine and intestinal barrier function research. Nutrients.
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Marco, M. L., et al. (2017). Health benefits of fermented foods: microbiota and beyond. Current Opinion in Biotechnology.
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Disclaimer: The content of this blog post is for informational purposes only and is not intended as medical advice. While I strive to provide accurate, well-researched, and up-to-date information, I am not a licensed medical professional. The insights shared here are based on personal research and experience. I encourage you to conduct your own research and consult a qualified healthcare provider before making any health-related decisions. Your well-being is important, and any actions taken based on the information in this blog are solely at your own discretion and risk.