de Castro Mendes F, Paciência I, Rufo JC, et al. - Researchers determined if the link between indoor air pollution and childhood asthma-related outcomes may be modulated by dietary inflammatory potential among 501 children (48.1% males, aged 7 to 12 years) recruited from 20 public schools located in Porto, Portugal. The assessment of airway reversibility, exhaled nitric oxide levels, atopy and current respiratory symptoms was performed. They used data obtained via a reported 24-hour recall questionnaire in order to calculate dietary inflammatory index, and grouped participants as having an anti-inflammatory or pro-inflammatory diet. Following adjustment, a pro-inflammatory diet vs an anti-inflammatory diet was found to be associated with a higher exposure effect of PM2.5 and PM10 (particulate matter) levels on children with asthma. A possible influence of the quality of diet on the link of indoor pollution and asthma in children was suggested in this study, this indicates the importance of children's diet as a potential protective factor to pollutants exposure in childhood asthma.