Apple for Respiratory Health

Research suggests a modest association between apple consumption and respiratory health, primarily drawn from one observational cohort study that tracked lung function over ten years in roughly 680 adults across Europe. That study found higher apple intake was associated with a slower rate of decline in lung capacity, with findings particularly notable among ex-smokers, though the apple-specific association did not remain statistically robust after full statistical correction, and the study's self-reported dietary data and observational design limit the strength of conclusions that can be drawn. The remaining studies provided in this review are unrelated to apple consumption or respiratory health as a nutritional question, covering topics such as protein interaction mapping, COVID-19 immunology, and diagnostic device development, and do not contribute evidence for or against this use. Overall, the direct evidence base for apples supporting respiratory health remains narrow and preliminary, with no clinical trials or controlled intervention studies identified, meaning the current findings are hypothesis-generating rather than conclusive.