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The Gut Theory Journal

Useful answers.
Properly sourced.

Thoughtful guides for real meals, busy weeks and better gut health. Clear enough to use. Careful enough to trust.

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What happens in your gut after a big meal

Real life digestion • 6 min read

What happens in your gut after a big meal

A big meal can leave you full or bloated. Here is what your stomach is doing, why fullness is not the same as harm, and what may help.

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The full journal

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Named probiotic strains: why identity matters

Gut basics • 6 min read

Named probiotic strains: why identity matters

Why the strain code on a probiotic label matters, what proprietary blends can hide and how to judge a formula beyond its headline CFU count.

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A person enjoying lentils, roasted vegetables and bread at a table

Food and fibre • 7 min read

Your gut does not eat nutrients. It eats meals.

A nutrition panel lists grams. Your digestive system meets texture, structure, temperature and timing. The food matrix explains why that ...

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After antibiotics: what microbiome recovery really looks like

Real life digestion • 3 min read

After antibiotics: what microbiome recovery really looks like

Antibiotics can disrupt gut microbes, but recovery is individual and usually more resilient than a detox story suggests. What the human s...

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The gut lining explained: permeability, 'leaky gut' and what we can actually say

Gut basics • 3 min read

The gut lining explained: permeability, 'leaky gut' and what we can actually say

The intestinal barrier is real and measurable. ‘Leaky gut syndrome’ is a much looser claim. Here is where established biology ends and sp...

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The gut brain connection, without the wellness theatre.

Gut basics • 3 min read

The gut brain connection, without the wellness theatre.

Stress can change gut movement and sensitivity, and gut symptoms can change how you feel. That is biology, not blame. Here is what the co...

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Constipation, clearly: what normal means and what to try first

Real life digestion • 3 min read

Constipation, clearly: what normal means and what to try first

Constipation is more than a number. Stool consistency, straining and a change from your normal all matter. Here is a sensible first line ...

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Fibre without the misery: how to increase it without overwhelming your gut

Food and fibre • 3 min read

Fibre without the misery: how to increase it without overwhelming your gut

Fibre can support bowel function and feed gut microbes, but a dramatic overnight increase can feel rough. A practical guide to types, pac...

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Bloating after meals: what helps, what is hype and when to get help

Real life digestion • 3 min read

Bloating after meals: what helps, what is hype and when to get help

Bloating is common, but it is not one problem with one fix. Here is how to look for patterns, try sensible first steps and know when a cl...

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The GX-5™ approach: five roles, one deliberate formula

Research • 3 min read

The GX-5™ approach: five roles, one deliberate formula

GX-5™ is our framework for building The Daily Buffer around complementary everyday gut functions—without hiding the active amounts.

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How to read a gut-health study

Research • 2 min read

How to read a gut-health study

A published paper is evidence. It is not automatically a final answer.

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Pre-, pro-, syn- and fermented: a precise guide

Gut basics • 2 min read

Pre-, pro-, syn- and fermented: a precise guide

The vocabulary is crowded. The consensus definitions make it much easier.

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Probiotics 101: strains, doses and labels

Gut basics • 2 min read

Probiotics 101: strains, doses and labels

A large CFU number is easy to market. A defined strain, an appropriate dose, stability and relevant human evidence are harder—and more us...

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Emulsifiers and sweeteners: why the details matter

Food and fibre • 2 min read

Emulsifiers and sweeteners: why the details matter

“Additive” describes a function in food. It does not tell you the dose, the molecule, the evidence or the outcome.

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Modern food and the gut: what human trials actually show

Real life digestion • 2 min read

Modern food and the gut: what human trials actually show

Food changed. Your gut still has the same job. That is worth understanding—without turning convenience, cafés or takeaway into moral fail...

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Fibre, fermented food and the microbiome

Food and fibre • 2 min read

Fibre, fermented food and the microbiome

Both can be useful. They are not the same intervention, and more is not always better.

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The Gut, in Plain English

Gut basics • 2 min read

The Gut, in Plain English

Your gut breaks food down, moves it through, absorbs what you need and maintains a boundary between the outside world and the rest of you...

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Our editorial standard

Useful, honest and easy to check.

01

Human evidence first

We start with trusted health guidance and studies in people. Early research is clearly labelled.

02

We explain the limits

We explain what a study can prove, what it cannot and where results disagree.

03

Reviewed and dated

Important claims link to their source and guides show when evidence was reviewed.