H. pylori: How One Small Bacterium Changes the Terrain of Your Stomach
If you've ever been told you carry H. pylori, it's easy to feel a little alarmed. But in naturopathy we don't see a bacterium in isolation. We see the terrain it lives in. And H. pylori is remarkable because it doesn't just live in the stomach. It reshapes it.
A survivor in a very acidic place
Your stomach is meant to be intensely acidic, and that acidity does a lot of quiet work. It begins protein digestion, releases nutrients from your food, and acts as a first line of defence against unwanted microbes.
H. pylori is a spiral-shaped, gram-negative bacterium, and it has an ingenious way of surviving in there. It produces an enzyme called urease, which breaks down urea (a compound naturally present in the stomach) into ammonia and carbon dioxide. Ammonia is alkaline, so it neutralises the acid in the bacterium's immediate surroundings and wraps it in a little protective cloud of higher pH.
From there, H. pylori burrows into the mucus layer coating the stomach wall, where conditions are already gentler, and settles in against the lining.
In other words, it makes its own environment more habitable. And the ammonia isn't gentle on the lining itself. It can irritate the surface cells, while other compounds the bacterium produces keep the immune system on alert. Its outer wall also carries lipopolysaccharide (LPS), a component of gram-negative bacteria, which adds to the picture of ongoing low-grade inflammation.
The flow-on effect: when stomach acid drops
This is where the story reaches far beyond the stomach. When the stomach environment shifts over months and years, through that ammonia buffering, ongoing inflammation, and changes to the acid-producing cells of the lining, stomach acid output can fall. And nutrient absorption depends heavily on that acid.
Protein. Acid activates pepsin, the enzyme that begins breaking protein down. With less acid, protein digestion is less efficient. You might notice bloating, heaviness after meals, or that protein-rich foods sit poorly. Poorly digested protein also means fewer of the amino acids your body needs for repair, hormones, neurotransmitters, and healthy skin.
Vitamin B12. B12 is tightly bound to the protein in your food, and stomach acid is what frees it. The stomach lining also produces intrinsic factor, the carrier that B12 needs to be absorbed further along. When the lining is inflamed or worn down over time, both steps can be affected. Low B12 can show up as fatigue, brain fog, low mood, tingling in hands and feet, or feeling flat despite a good diet.
Iron. Acid helps convert dietary iron into a form that's easier to absorb. Reduced acid, plus the bacterium's own appetite for iron, is one reason some women find their iron stays stubbornly low even when they're eating well.
Zinc, magnesium, calcium, and other minerals. Minerals need an acidic environment to dissolve and be absorbed. Low levels of these can touch everything from energy and sleep to mood, skin, and immune resilience.
How it can affect your health
H. pylori is often quiet for a long time. Because the changes are gradual, many people simply adapt to feeling "a bit off" and don't connect the dots. Over years of harbouring it, the effects rarely stay in the stomach:
Digestive comfort. Ongoing irritation of the stomach lining is a common cause of bloating, burning, nausea, reflux-like symptoms, and that heavy, full feeling after meals. Many women live with these for years and assume it's just how their digestion is.
Stomach lining health. Long-term inflammation can wear the protective lining down. This is linked to gastritis and ulcers, and over many years to thinning of the lining (atrophy) and the lower acid output that follows.
Energy and vitality. When protein, B12, and iron absorption are affected, fatigue is often the first thing women notice. Low iron and B12 can also bring breathlessness, pale skin, dizziness, and brain fog.
Mood and nervous system. B12 and amino acids are raw materials for neurotransmitters and nerve health. Persistently low levels can show up as low mood, poor concentration, anxiety, or tingling in the hands and feet.
Skin. Poor nutrient status and ongoing inflammation can show in the skin as dullness, slow healing, and flare-ups. Some research has also explored links between H. pylori and skin conditions such as rosacea and chronic hives, though the evidence is still mixed and every person is different.
Gut ecology. Stomach acid is part of the gut's first line of defence. When it's reduced, more microbes survive the journey downstream, which can contribute to bloating, dysbiosis, and imbalances further along the digestive tract.
Bones and minerals. Calcium, magnesium, and zinc all rely on a healthy acidic environment for absorption. Over the long term, shortfalls can affect bone strength, sleep, immunity, and stress resilience.
Long-term risk. Long-standing H. pylori colonisation is the best-recognised risk factor for stomach cancer. It's important to keep this in perspective: most people who carry it never develop cancer, and risk is influenced by genetics, diet, smoking, and how long the inflammation has been going on. But it's exactly why we encourage testing and a proper plan rather than leaving it to chance.
The encouraging part is that the terrain can change. Supporting the gut lining, restoring nutrients, and building microbial diversity all work in your favour.
Our approach: rebalance the terrain
At Zen on Elliott, the goal isn't to wage war on the gut. It's to support a more diverse, resilient ecosystem, one where no single organism dominates. A more diverse gut tends to be better at keeping opportunistic microbes in check.
Some of the ways we do this:
- Eat the rainbow, widely. Aim for 30 or more different plants each week (vegetables, fruit, herbs, nuts, seeds, legumes, wholegrains). Different fibres feed different microbes.
- Bring in polyphenols. Green tea, berries, extra virgin olive oil, pomegranate, and cacao all support a healthier gut environment.
- Try broccoli sprouts. They're rich in sulforaphane, which has been studied for its effect on H. pylori and stomach lining inflammation.
- Add fermented foods. Yoghurt, kefir, sauerkraut, and kimchi introduce beneficial microbes.
- Go easy on salt and ultra-processed foods. High salt intake appears to make H. pylori more troublesome.
- Support digestion at meals. Sit down, chew well, and don't eat on the run. Bitter greens before a meal can help prime digestive secretions.
- Look after your nervous system. Stress and poor sleep directly influence gastric secretions and immune balance. The gut listens to the nervous system.
- Replenish what's run low. Where protein, B12, iron, or other nutrients are affected, a tailored plan matters more than guesswork.
What to expect when you start: feeling worse before better
When you begin changing your diet, some people notice they feel a little worse before they feel better. This is sometimes called a Herxheimer reaction, or "die-off."
The idea is this: as the gut ecosystem shifts and H. pylori numbers start to fall, the bacteria that break down can release components from their cell walls, including the LPS we talked about earlier. These can briefly stir up the immune system, and for a few days you might notice:
- Increased bloating or gas
- Fatigue or a heavy, foggy feeling
- Headaches
- Nausea or unsettled digestion
- Achy, flu-like feelings
- Skin flare-ups or a change in bowel habits
A second reason you might feel unsettled at first is simply adjustment. More plant fibre, fermented foods, and polyphenols all change what your gut microbes are fed, and it takes a little while for the ecosystem to settle into the new rhythm.
How to make the transition gentler
- Go slowly. Introduce one new food at a time rather than overhauling everything overnight. Start broccoli sprouts and fermented foods in small amounts and build up.
- Keep hydrated. Water, herbal teas, and warm broths support your body's natural elimination pathways.
- Rest. If you feel flat for a few days, let yourself ease off. Your body is doing a lot of work.
- Keep meals simple and nourishing. Cooked vegetables, soups, and easy-to-digest proteins are kinder than raw and heavy meals while things settle.
- Support your bowels. Regular bowel movements help clear what your body is releasing.
- Ease off, don't push through. If a food doesn't sit well, pause and reintroduce it later.
Most people find that any unsettled feeling passes within a few days to a week or two. If symptoms are strong, last longer than that, or you notice any of the warning signs listed below, please get in touch with us rather than putting it down to die-off.
Testing first, then a plan that's yours
If you suspect H. pylori, or you've had a positive result, the first step is to know where you stand. Your naturopath can arrange GI-MAP testing, a comprehensive stool test that detects H. pylori and its virulence factors, and gives a wider look at your gut microbiome, digestive function, and inflammation markers. From there, we can build an individualised approach around your symptoms, your nutrient status, and your gut health.
Seek medical attention promptly if you ever notice black stools, vomiting blood, persistent vomiting, difficulty swallowing, or unexplained weight loss.
Ready to look at your own terrain?
Every gut tells a different story. If you'd like support understanding yours, we'd love to see you at Zen on Elliott. Book a consultation and we'll take the time to listen, then build a gentle, food-first plan that fits your life.
