Can Helicobacter help with Allergie?

The question of whether Helicobacter pylori (Hp) can help with allergies is scientifically unresolved. The 'hygiene hypothesis' suggests that early colonization with Hp might modulate the immune system and reduce allergy risk. Some observational studies indeed show an inverse association between Hp infection and asthma or hay fever. However, these are observational and do not prove causation. Moreover, Hp is a well-established risk factor for peptic ulcers, chronic gastritis, and gastric cancer. Deliberately acquiring or retaining a confirmed infection for allergy prevention would be irresponsible. The overall evidence is weak and contradictory. No randomized controlled trials demonstrate benefit. Current guidelines recommend Hp eradication when detected, especially in at-risk individuals. Any potential allergy protection does not outweigh the proven risks. More research is needed to understand the immunological pathways. Until then, the answer remains: No, Helicobacter should not be considered a 'helper' against allergies.