The Role of Proteins in Breastmilk

This infographic provides healthcare professionals with an evidence-based overview of proteins in human breastmilk and their vital role in infant development. Proteins in breastmilk include over 1500 different types, grouped mainly into whey and casein, along with free amino acids. Together, they support growth, immune defense, mineral absorption, and gut function. Protein levels vary according to lactational stage, gestational age, maternal factors, geography, and infant gender, making them a dynamic component of early nutrition.

The Takeaway for Healthcare Professionals

This visual resource helps you understand how proteins contribute to infant health. By exploring this infographic, you will:

• Learn how breastmilk proteins act as building blocks for bones, muscles, and organs

• Understand their role in immune protection, mineral absorption, and gut health

• Recognize differences in protein content across colostrum, transitional, and mature milk

• Review factors influencing protein variation, such as preterm birth, maternal age, geography, and infant gender

• Explore the changing whey-to-casein ratio (90:10 in colostrum to 50:50 in mature milk)

View the Infographic on DNC

Take a moment to explore the full infographic directly on this page. It offers clear visuals, scientific references, and practical insights to support your conversations with parents and strengthen your expertise in early life nutrition.