Here is the sentence most "H. pylori diet" articles bury in paragraph nine, so we'll put it first: no food kills an established Helicobacter pylori infection. Eradication is a medical treatment — a physician-prescribed course of antibiotics, usually paired with an acid-reducing medication. If a page tells you that garlic, broccoli sprouts, or manuka honey will clear H. pylori on its own, close the tab.
What diet genuinely can do is still worth doing. It can ease symptoms while you're infected, support your body through treatment, and possibly reduce antibiotic side effects. This guide covers those roles honestly — the foods with supportive evidence, the ones to avoid, and a realistic 7-day menu built from normal grocery-store food. It's educational content, not medical advice; treatment decisions belong with your physician. (New to H. pylori? Start with our full H. pylori symptoms, testing and treatment guide.)
Diet Supports. Antibiotics Treat.
Standard eradication therapy — typically two antibiotics plus a proton-pump inhibitor, sometimes with bismuth — clears the infection in the large majority of people, according to guidance summarized by sources like the Mayo Clinic. Food plays three supporting roles around that treatment:
- Symptom management: gentler meals reduce the burning, bloating and nausea an irritated stomach lining produces.
- Adjunct support: a handful of foods show modest anti-H. pylori or gut-protective activity in research — useful alongside treatment, not instead of it.
- Tolerability: eradication protocols are hard on the gut. Some dietary choices, especially probiotics, may help you complete the full course.
Foods With Supportive Evidence (as Adjuncts, Not Cures)
Every item below comes with the same caveat: the evidence is early, the effects are modest, and none of these replaces treatment.
- Broccoli sprouts (sulforaphane): small human studies suggest sulforaphane-rich broccoli sprouts may suppress H. pylori activity and reduce gastric inflammation while you're eating them — suppression, not eradication (see the research indexed on PubMed).
- Green tea: its catechins show anti-H. pylori activity in laboratory studies; as an everyday, low-acid coffee replacement it's a reasonable adjunct.
- Honey: lab studies suggest antibacterial activity (manuka gets the most attention), and it's a gentle sweetener for an irritated stomach. Human evidence is thin.
- Garlic: antibacterial in test tubes; small studies in people are mixed. Cooked garlic is usually better tolerated than raw on an inflamed stomach.
- Probiotics: the best-supported adjunct. Reviews suggest certain strains (Lactobacillus species, Saccharomyces boulardii) taken alongside antibiotic therapy may reduce side effects such as diarrhea and help people finish the protocol — and some analyses suggest a modest improvement in eradication rates. Yogurt and kefir are the food route; discuss supplement strains with your prescriber.
- Omega-3s (fatty fish, flax): small studies suggest anti-inflammatory support for the gastric lining — a sensible pattern regardless.
What to Avoid While Infected or Healing
- Alcohol — directly irritates the stomach lining and slows ulcer healing.
- Coffee and caffeine — stimulate acid production; many people notice more burning. Green tea is the gentler swap.
- Very spicy food — doesn't cause the infection, but commonly aggravates symptoms while the lining is inflamed.
- Heavily salted and pickled foods — this one is more than comfort: high salt intake is a genuine gastric risk cofactor with H. pylori, so cutting salted, cured and pickled foods matters while you're infected.
- Smoking — impairs ulcer healing and reduces treatment success.
- NSAIDs (ibuprofen, naproxen, ASA) — add their own insult to the stomach lining. Don't stop a prescribed medication on your own; ask your physician what's safe while you're treating H. pylori.
A Realistic 7-Day H. Pylori Diet Menu
No exotic products, no $40 powders — just a week of gentle, low-salt meals that work the adjunct foods in naturally. Drink water or green tea with meals, and swap any day for another freely: the pattern matters more than the specific dishes.
Smaller portions eaten more slowly tend to sit better than three large meals while your stomach lining is irritated. If a listed food bothers you, drop it — symptom feedback beats any menu.
What Does H. Pylori Poop Look Like?
This is one of the most-searched H. pylori questions, and the honest answer is: nothing. H. pylori is a microscopic bacterium living in your stomach lining — it is not visible in stool, and no change in colour, texture or smell can confirm or rule out an infection by eye.
Testing — not looking — is how you know whether you have H. pylori. Your doctor can arrange a urea breath test, or you can test from home with a stool test: the GI-MAP™ H. Pylori Profile ($299.99 CAD) uses qPCR to detect and quantify H. pylori along with its virulence factors (like cagA and vacA), which help a practitioner gauge how aggressive a strain is. The kit ships free both ways in Canada and returns by prepaid Canada Post label — see how it works.
Will H. Pylori Come Back?
Recurrence is real but uncommon in developed countries like Canada after successful eradication — most people who clear the infection stay clear. The bigger practical issue is confirming it was actually eradicated in the first place, since first-round treatment doesn't work for everyone. Retest at least four weeks after finishing treatment (your provider may also have you pause acid-suppressing medication before testing). A quantitative stool test makes the before-and-after comparison simple, and if symptoms persist despite eradication, a broader look at the gut — like the full GI-MAP™ Standard panel — can show what else is going on. Antibiotics also reshape the wider gut ecosystem; we cover that in what antibiotics do to your gut.