Evidence check: Magnesium in the context of allergy

Magnesium is often discussed in the context of allergies due to its role in regulating histamine release and inflammatory pathways. Some studies suggest a potential benefit for allergic rhinitis or asthma, but the overall evidence is weak and inconsistent. Most data come from mechanistic or animal studies, while human randomized controlled trials are scarce and show modest effects. Magnesium deficiency may modulate immune responses, but routine testing or supplementation for allergy management is not supported by current guidelines. Caution: High-dose magnesium supplements (e.g., >350 mg/day) can cause diarrhea and gastrointestinal discomfort. For food allergies or intolerances, specific tests like IgE measurement or elimination diets are more reliable. In summary, the link between magnesium and allergies remains scientifically inconclusive, and no strong recommendations can be made based on existing evidence.