A significant study led by researchers from NYU Langone Health and the University of Manitoba has revealed that breastfeeding beyond three months substantially lowers the risk of asthma in children by fostering the healthy development of their gut and respiratory microbiomes. The research indicates that human breast milk contains complex sugars that only certain microbes can digest, promoting a beneficial microbial community critical for respiratory and immune health. Conversely, early weaning disrupts this microbial maturation, leading to a higher likelihood of preschool asthma. The study, part of the CHILD Cohort Study following 3,500 Canadian children, emphasizes the importance of breastfeeding in establishing a healthy microbial makeup, which can influence long-term health outcomes. Furthermore, the research highlights the need for public health initiatives that support extended breastfeeding as a preventative measure against asthma and other health issues. Overall, the findings underscore the vital role of maternal nutrition and breastfeeding in shaping infant health and development.