Asthma
Milk consumption and mucus production in children with asthma
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3279269/
Apple phytochemicals and their health benefits
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC442131/
Effects of Fruit and Vegetable Consumption on Risk of Asthma, Wheezing and Immune Responses: A Systematic Review and Meta-Analysis
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5409680/