Manuka Honey Organic

Mānuka Honey and the Stomach: H. pylori and the Research

By Bart Magera
Is Manuka Honey Good for Stomach Problems?

The most-studied stomach-related research question for Mānuka honey is whether it acts on Helicobacter pylori, the bacterium associated with most peptic ulcers and a leading cause of gastric cancer. The in-vitro evidence is suggestive. The human evidence is much weaker.

What the laboratory evidence shows

Osato, Reddy and Graham (1999, Digestive Diseases and Sciences) showed that honey inhibited H. pylori growth in vitro, with the effect attributed primarily to honey's osmotic properties (high sugar concentration drawing water out of bacterial cells) rather than antibacterial compounds specifically.

Manyi-Loh et al. (2010, Archives of Medical Research) tested South African honeys (including a Mānuka-comparable manufactured honey) against H. pylori and confirmed in-vitro activity, though noted the activity varied widely by honey source.

The mechanistic reasoning is consistent with Mānuka's known antibacterial profile: high MGO content provides activity beyond the osmotic effect alone, and laboratory studies have shown Mānuka honey is effective in vitro against gut-relevant pathogens.

What the human evidence shows (less)

Hashem-Dabaghian et al. (2016, Iranian Red Crescent Medical Journal) tested a combination of Nigella sativa (black seed) and honey for H. pylori eradication in humans and reported some effect, though the trial was small and the design did not isolate honey alone.

No large-scale randomized trial has tested Mānuka honey as a standalone H. pylori treatment in humans. Established H. pylori treatment is triple or quadruple antibiotic therapy, which has 80-90% eradication rates in trials.

Beyond H. pylori

For other stomach concerns (general indigestion, acid reflux, IBS), the published research on honey is preliminary. Honey is high in fructose and may worsen symptoms in people with fructose malabsorption or IBS.

What this means for buyers

  • The laboratory evidence for Mānuka honey vs H. pylori is real but does not establish clinical efficacy.
  • If you suspect H. pylori infection, the diagnosis and treatment belong to your physician.
  • People with diabetes, fructose malabsorption, or IBS should be cautious about regular honey consumption.

If you are considering Mānuka for general gut interest, see our roundup for current high-MGO options. Higher MGO content is the relevant variable for the laboratory antibacterial profile (see our MGO explainer).

Sources

  • Osato MS, Reddy SG, Graham DY. Osmotic effect of honey on growth and viability of Helicobacter pylori. Digestive Diseases and Sciences. 1999;44(3):462-4.
  • Manyi-Loh CE, Clarke AM, Munzhelele T, Green E, Mkwetshana NF, Ndip RN. Selected South African honeys and their extracts possess in vitro anti-Helicobacter pylori activity. Archives of Medical Research. 2010;41(5):324-31.
  • Hashem-Dabaghian F, Agah S, Tabatabaei-Malazy O, et al. Combination of Nigella sativa and Honey in Eradication of Gastric Helicobacter pylori Infection. Iranian Red Crescent Medical Journal. 2016.