Is the phrase "breast is best" actually supported by science?

Science · Published 12 October 2026 Swipe more like this →

In short: For years, the parenting community has relied on the mantra "breast is best." But when we look at the actual science of infant nutrition, the reality is more nuanced. While breast milk offers unique advantages, the choice between milk and formula often depends on a mother's specific health and life circumstances.

The debate over infant nutrition often centers on the nutritional profile of breast milk versus formula. Medical experts, including those at the Mayo Clinic, agree that breastfeeding is a wonderful way to nourish a newborn and provides numerous benefits. Breast milk is characterized by its ability to provide ideal nutrition, containing the precise nutrients in the correct amounts to nourish a baby completely. This nutritional profile is highly regarded by child health organisations. Such experts frequently advocate for breastfeeding as a primary method of nourishment.

However, the biological ideal does not always account for human reality. Not all women are the same, and individual life situations play a significant role in feeding decisions. For instance, certain health issues, such as specific diseases or the treatments used for them, may make infant formula a better choice for a mother and child. Additionally, practical factors like returning to work and the availability of workplace accommodations for using a breast pump can influence whether a parent can sustain breastfeeding. Workplace environments can also play a role in this choice. Having access to facilities for pumping milk is a vital consideration for many.

It is important to note that the duration of breastfeeding can impact the level of protection provided. Experts suggest that the longer a person breastfeeds, the greater the chances that the baby will experience health benefits, and the more likely those benefits are to last. Ultimately, medical providers emphasize that both breast milk and formula can provide the necessary nutrition for a child to grow and thrive, and the decision remains a personal one for the family. Regardless of the method chosen, feeding promotes intimacy between parent and child. Both options ensure that a growing infant receives the essential nutrients required for development.

General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.

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