Impact of Diet on Helicobacter pylori Treatment Success
Introduction to Helicobacter pylori
Scientists have investigated the potential impact of diet on the success of Helicobacter pylori treatment, focusing specifically on nutrients like cholesterol and omega-3 fatty acids. Helicobacter pylori poses a significant global health challenge, as it is responsible for conditions such as gastritis and gastric ulcers. Approximately 50% of the world’s population is affected by this infection, which can lead to chronic gastrointestinal diseases and, in severe cases, increase the risk of gastric adenocarcinoma.
Treatment Protocol in Japan
In Japan, the standard treatment for Helicobacter pylori consists of a triple-drug therapy that includes two antibiotics and a proton pump inhibitor. However, over the past two decades, the success rate of this eradication therapy has decreased significantly, with only 70% of patients currently responding effectively. The reasons behind this decline remain unclear, though factors like antibiotic resistance, smoking, and alcohol consumption are suspected contributors.
Role of Nutrients in Treatment Success
While the relationship between different nutrients and the success of eradication therapy is suspected, there are few epidemiological studies confirming these links. A recent observational study conducted in Japan, published in the American Journal of Clinical Nutrition, explored the influence of food and nutrient intake on the success of Helicobacter pylori eradication therapy.
Study Overview
The study involved 352 Japanese patients—147 males and 205 females, aged 30 to 79—who were diagnosed with Helicobacter pylori. Participants underwent a week-long triple-drug eradication therapy (lansoprazole, amoxicillin, and clarithromycin) and had positive results on the 13C-urea breath test (UBT). Notably, 19% of these patients also had gastritis and/or duodenal ulcers. A follow-up UBT was conducted eight weeks later, with a negative result indicating successful treatment. Various statistical analyses were employed to identify factors influencing treatment success, including body measurements, sociodemographic data, blood samples, and dietary information.
Findings on Treatment Success Rates
The overall success rate of the eradication therapy was found to be only 60.2%. Factors hindering successful treatment included older age, higher levels of C-reactive protein (CRP)—an inflammation marker—and increased daily intakes of iron, vitamin D, omega-3 highly unsaturated fatty acids (omega-3 HUFAs), and cholesterol. Among these, cholesterol exhibited the most significant negative impact on treatment outcomes. Increased consumption of fish and eggs was also linked to therapy failure. Interestingly, there were correlations between higher fish intake and increased levels of vitamin D and omega-3 HUFAs, as well as between higher egg consumption and elevated cholesterol levels.
Cholesterol’s Role in Antibiotic Resistance
The observed adverse effects of cholesterol on eradication therapy are not unexpected, given that Helicobacter pylori utilizes cholesterol to bolster its antibiotic resistance and enhance its virulence. However, further research is essential to clarify the roles of omega-3 HUFAs and vitamin D in eradication therapy, particularly since both nutrients have demonstrated anti-Helicobacter pylori properties and are frequently advocated by health experts.
Conclusion and Future Research Directions
While this study indicates that nutrient intake significantly affects the success of Helicobacter pylori eradication therapy, further investigation is necessary to validate and clarify these findings. This is particularly important given that the study involved a small, ethnically homogeneous group, which may limit the applicability of the results to broader populations. Additionally, dietary intake assessments relied on self-reported questionnaires, raising the possibility of reporting bias that could weaken the associations observed.
Overall, the study concluded that increased consumption of omega-3 fatty acids, iron, and cholesterol correlates with lower success rates in Helicobacter pylori treatment.
Reference
Ikezaki H, Furusyo N, Jaques PF, et al. Higher dietary cholesterol and ω-3 fatty acid intakes are associated with a lower success rate of Helicobacter pylori eradication therapy in Japan. Am J Clin Nutr. 2017;106:581-588. Available from: doi.org: 10.3945/ajcn.116.144873.