Breastfeeding is a powerful tool that offers numerous benefits for both mothers and babies, extending far beyond the immediate advantages of boosting immunity and preventing infections. Emerging research suggests that breastfeeding in infancy may have a protective effect against mortality in middle and late adulthood, and it plays a crucial role in shaping the infant’s microbiome, which is critical for overall health and well-being.
Breastfeeding and Chronic Disease Prevention
One of the most significant long-term benefits of breastfeeding is its potential to reduce the risk of chronic diseases later in life. Studies have shown that breastfeeding has a protective effect against type 2 diabetes, with the effect being similar in magnitude to that of diet and dietary advice. Breastfeeding may also help prevent obesity, a major risk factor for many chronic conditions, by helping infants develop healthy eating patterns and the ability to self-regulate their food intake.
Breastfeeding and the Microbiome
Breastfeeding plays a significant role in shaping the infant’s microbiome, which is a complex ecosystem of microorganisms that inhabit the gut. Breastmilk contains a diverse array of beneficial bacteria, including bifidobacteria, lactobacilli, and streptococci, as well as prebiotics, such as human milk oligosaccharides (HMOs), which serve as a food source for beneficial bacteria. Studies have consistently shown that breastfed infants have a higher abundance of beneficial bacteria in their gut microbiome compared to formula-fed infants, which helps to maintain a healthy balance of the microbiome.
The Benefits of Breastfeeding for the Microbiome
Breastfeeding has been shown to have numerous benefits for the microbiome, including:
- Increased Abundance of Beneficial Bacteria: Breastfed infants have a higher abundance of beneficial bacteria, such as bifidobacteria and lactobacilli, in their gut microbiome compared to formula-fed infants.
- Improved Immune Function: Breastfeeding promotes the development of a healthy immune system by providing beneficial bacteria that help to regulate immune function and prevent disease.
- Reduced Inflammation: Breastfeeding has been shown to reduce inflammation in infants, which is associated with a lower risk of disease.
- Lower Risk of Disease: Breastfeeding has been linked to a lower risk of disease, including respiratory infections, diarrhea, and ear infections.

Breastfeeding and Mortality Risk
A recent study published in the Journal of Internal Medicine found that breastfeeding in infancy is associated with a lower risk of mortality, even decades later, in middle and late adulthood. The researchers suggest that the long-term benefits of breastfeeding may be due to its impact on the development of the immune system and metabolic programming.
Promoting Breastfeeding for Lifelong Health
Given the potential long-term benefits of breastfeeding, it is crucial to support and promote this practice. Healthcare providers can play a key role by educating expectant and new mothers about the advantages of breastfeeding and providing practical support and resources to help them succeed. Community-based initiatives, such as breastfeeding support groups and workplace policies that accommodate breastfeeding, can also help create an environment that encourages and enables mothers to breastfeed for as long as they choose.
Conclusion
Breastfeeding is a powerful tool that offers numerous benefits for both mothers and babies, laying the foundation for lifelong health and a healthy microbiome. By promoting breastfeeding and supporting mothers in their breastfeeding journey, we can help ensure that all children have the best possible start in life and reduce the risk of chronic diseases and premature mortality in adulthood.
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Breastfeeding in infancy and mortality in middle and late adulthood: A prospective cohort study and meta-analysis, Wang, Xiaoyan, https://doi.org/10.1111/joim.13619