Myths vs facts: Glukose and allergy

The claim that glucose (sugar) directly causes or worsens allergies is a common myth. In reality, there is no strong evidence from controlled trials establishing a causal link between sugar intake and allergic reactions. Allergies are immune-mediated overreactions to otherwise harmless substances (allergens). Glucose itself is not an allergen. However, a very high-sugar diet may indirectly influence inflammation or gut microbiota, potentially modulating immune responses. Some observational studies suggest an association between high sugar consumption and increased risk of asthma or eczema, but these associations are weak and confounded by factors like obesity and sedentary lifestyle. The evidence is therefore moderate to weak. For individuals with existing allergies, there is no recommendation to completely avoid sugar. A balanced diet with moderate sugar intake is advisable, but not as allergy therapy. Be cautious of marketing claims that portray sugar as a sole trigger for allergies.