How can breastfeeding positively affect an infant’s immune system?

Breastfeeding has a significant positive impact on an infant's immune system primarily by providing a source of antibodies. When a mother breastfeeds, she passes on immunoglobulins, especially IgA, through her milk, which helps protect the infant from infections and diseases. These antibodies form a crucial part of the infant's immune defense by aiding in the development of their own immune system. Additionally, breast milk contains other immune-boosting components such as lactoferrin, which has antimicrobial properties, and various oligosaccharides that promote beneficial gut bacteria.

While iron supplementation is important for an infant's overall health, the primary benefit of breastfeeding in terms of immune support is linked to the antibodies and other immune factors present in breast milk. These factors are specifically designed to tailor the infant's immune responses and help them combat pathogens effectively over time. Thus, breastfeeding serves not only as nourishment but as a vital contributor to building a strong, resilient immune system.