This article discusses two studies that explore the relationship between DNA methylation and asthma development, as well as prenatal vitamin D levels and childhood asthma. The first study found that DNA methylation in newborns is linked to the development of asthma in adolescence, with specific CpG sites potentially serving as biomarkers for different types of asthma. The second study found that higher levels of vitamin D during pregnancy are associated with a reduced risk of childhood asthma. Both studies emphasize the importance of understanding these factors in the development of asthma and suggest further avenues for research. [Extracted from the article]