September 3, 2026

Maybe It’s Not What You’re Eating. It’s What You’re Not Digesting.

What actually happens when food does not get broken down, and why cutting more things out has never fixed it

Start with a number, because it reframes everything that follows.

The bacteria in your colon can produce up to one litre of hydrogen gas in twenty-four hours. Not a metaphor. An actual litre. Hydrogen is the most predominant gas your gut bacteria make, and it is produced by exactly one process: the fermentation of food that arrived in your colon still intact.

That is the whole story of bloating in a sentence. Not what you ate. What failed to get broken down before it got there.

The chain, in order

Digestion is a sequence, and like any sequence it fails at its weakest link.

Food enters. Enzymes go to work on it. Amylase breaks down starch. Protease breaks the peptide bonds holding proteins together. Lipase handles fats. Between them, they are supposed to reduce everything you eat into fragments small enough for your small intestine to absorb through its wall.

When that works, most of a meal is absorbed before it ever reaches the colon.

When it does not work, the unabsorbed remainder keeps travelling. Some carbohydrates are not digested or absorbed in the small intestine because of a shortage or absence of certain enzymes, and that undigested food passes into the large intestine, where the normal resident bacteria break it down instead.

Your bacteria are not doing anything wrong. They are doing their job. They found food, so they ate it. The by-products of that meal are hydrogen, carbon dioxide, and in about a third of people, methane.

Gas has volume. Volume needs somewhere to go. That is the distension, the pressure, the waistband at three in the afternoon.

Why the elimination diet felt like it worked

Here is the part worth sitting with, because almost everyone reading this has already run the experiment on themselves.

You noticed bread made it worse, so you stopped eating bread. It helped. Then onion. Then dairy. Then anything with garlic in it. Each time, a bit better. Eventually you are down to a handful of meals you trust, and you still do not feel right, and you have quietly concluded that your body is the problem.

It helped because you removed the fermentable substrate. Take away the material and the bacteria have nothing to work on, so there is less gas. That relief was real.

But notice what did not change. Your ability to break food down is exactly where it was. You did not repair the step that was failing. You shrank your life around it.

And the list only ever grows in one direction. Nobody has ever finished an elimination diet with more foods than they started with.

Time is an ingredient

There is a second variable most people miss entirely, and it is not what you eat. It is how long it sits.

Constipation makes fermentation worse for a purely mechanical reason: the longer food waste remains in your colon, the more time bacteria have to work on it. Same material, more hours, more gas. Transit time is not a side issue. It is a multiplier on everything else.

This is where ginger earns its place, and the research is more specific than most people expect.

In healthy volunteers, gastric half emptying time was measured at 12.3 minutes with ginger, against 16.1 minutes with a placebo. Roughly a quarter faster, and statistically significant. The mechanism is well mapped: gingerols and shogaols act through cholinergic pathways, the acetylcholine signalling that tells smooth muscle to contract. Ginger stimulates antral contractions, the wave that pushes stomach contents forward, and it influences digestive enzymes including trypsin and pancreatic lipase.

Ginger does not settle your stomach so much as it gets it moving. Those are different jobs, and for this particular problem, moving is the useful one.

Meanwhile, the lining is taking the hit

While all of this is happening, the surface it happens on is under strain. And this is where a tree comes into it.

There is a tree across the eastern half of North America called Ulmus rubra, the slippery elm. Native American communities used its inner bark structurally, for canoes, for shelters, for baskets, and they also stripped that same bark, mixed it with water and drank it. It was a poultice for wounds and a remedy for sore throats. Soldiers in the American Revolution carried the paste as a salve. By the late nineteenth century, a preparation of elm mucilage had been written into the United States Pharmacopoeia, the official register of recognised medicines.

The mechanism is not mystical. The inner bark contains mucilage, a complex polysaccharide that becomes a soft gel the instant it meets water. That gel coats. It forms a slick, protective layer across mucous membranes and stimulates mucous production. Herbalists call this class of plant a demulcent, something that soothes by covering.

A tree makes a gel, and the gel settles things down. Aloe vera, sitting alongside it in the same blend, belongs to the same category and the same very long record of use.

That bark went from riverbank to canoe to battlefield to pharmacy shelf. It was never folklore. It was correct before anyone could explain why.

The border guard runs on something specific

Your small intestine is lined with cells called enterocytes. They are the border. They absorb what you need and exclude what you do not, and they replace themselves every few days. That is expensive work and it has to be paid for.

The primary metabolic fuel of the small intestinal enterocyte is glutamine.

Not glucose. Glutamine. The amino acid most people associate with gym supplements is, in the small intestine, the actual energy currency. Research on glutamine supplementation shows it supports intestinal cell proliferation and improves intestinal morphology, the physical structure of that lining.

The barrier between you and everything you have ever eaten is living tissue that needs feeding. Almost nobody thinks about feeding it.

Fermentation was never the villain

Here is the nuance most gut content gets wrong, and it matters.

Fermentation itself is not the problem. You want fermentation. What you do not want is the wrong material fermenting by accident because it slipped through undigested.

Chicory root inulin is a fructan, a chain of fructose molecules your own enzymes genuinely cannot break down, and that is precisely the point. It is supposed to reach the colon intact. When researchers fed chicory inulin into a laboratory model of the human gut ecosystem, short chain fatty acid production rose, with the balance shifting toward propionic and butyric acid.

Butyrate is worth knowing by name. It is the preferred fuel of the colonocytes lining your large intestine. Your bacteria eat the fibre, and what they produce is what your colon lining lives on.

So there is an economy running inside you. Something you cannot digest feeds something that is not you, which produces something that feeds you.

Deliberate fermentation of the right substrate in the right place is not the same event as accidental fermentation of a meal that should have been absorbed two metres earlier. One is the system working. The other is the system failing.

The point

The line people draw between natural and evidence based is mostly a marketing line, and a recent one.

Slippery elm was in the United States Pharmacopoeia. Ginger has measured effects on gastric emptying in controlled trials. Glutamine is textbook cell biology. Inulin fermentation is a characterised process with a name for every metabolite it produces. Amylase, protease and lipase are among the first things taught in any physiology course.

None of that is fringe. It is old knowledge that turned out to be right, and research that eventually caught up.

If you take one thing from this, take the curiosity. Look up the next ingredient you see on a label. Find out what it is, where it grew, and who used it first. The stories are consistently better than the marketing, and the mechanisms are consistently simpler than you were led to believe.

Enzymes break it down. Ginger keeps it moving. A tree coats what is irritated. An amino acid feeds the border. A fibre feeds the colony that feeds you.

You were never eating wrong. You were just not breaking it down.

GI Restore is built around that sequence: plant derived enzymes, ginger root, slippery elm bark, aloe vera, L glutamine, chicory root inulin and coconut milk powder. Seven ingredients. No fillers. Ten grams stirred into warm water.

GI Restore | Shop Now

Sources