ObjectivesThe aim of this study is to examine whether food allergy (FA) is associated with depression/psychological distress in a large Japanese sample. MethodsThis web-based survey was conducted on a platform of “Yahoo! JAPAN -HealthData Lab” and the Genequest Inc. (Tokyo, Japan). Participants were 1000 individuals with self-reported history of depression (mean age: 41.4 years, 501 men and 499 women) and the remaining 10,876 controls (mean age: 45.1 years, 5691 men and 5185 women). Six-item Kessler scale (K6) test cut-off score ≥13 was used to estimate severe psychological distress. We gained self-reported information on FA and 27 specific food allergens. ResultsThe proportion of individuals with FA, 2 or more, 3 or more, and 4 or more allergens was higher in the depression group compared to the control group (odds ratio [OR] = 1.64, 1.75, 2.02, and 2.27, respectively; P < 0.001). Allergen analyses revealed that allergies for shrimp, egg, mackerel, crab, kiwi fruit, milk, banana, and squid were more common in the depression group compared to the control group (P < 0.05). Individuals who had severe psychological distress was more common in the FA group than in the non-FA group, in the total participants (OR = 1.32, 1.62, 2.04 and 2.51; 1, 2, 3, and 4 or more allergens, respectively; P < 0.001). ConclusionsWe suggest that FA is likely to be a risk factor for depression and severe psychological distress, which is dependent on the number of food allergens. Funding SourcesThis work was supported by an Intramural Research Grant for Neurological and Psychiatric Disorders of National Center of Neurology and Psychiatry.