Brazil operates one of the world's largest and most effective human milk bank networks, providing donated breast milk to hundreds of thousands of infants at minimal cost. Photographer Kristin Bethge documented the system for New Scientist, revealing how these facilities collect, process, and distribute milk to vulnerable populations across the country.

The milk banks serve premature infants, babies with allergies, and children whose mothers cannot breastfeed. Brazil's network processes donated milk through rigorous safety protocols including screening donors for infectious diseases, pasteurizing milk to eliminate pathogens, and testing batches before distribution. The system operates at exceptionally low cost compared to international standards, making life-saving nutrition accessible to poor and underserved communities.

Brazil's milk bank initiative began in the 1980s and expanded dramatically over subsequent decades. The country now maintains hundreds of collection and distribution centers integrated into hospitals and health clinics. Donors—typically mothers with excess milk supply—undergo health screening before contributing. The collected milk undergoes heat treatment to kill harmful bacteria while preserving nutritional value and immune-boosting compounds that formula cannot replicate.

The system addresses a critical health disparity. Premature and sick infants require breast milk's unique composition for optimal development. Donated milk provides these benefits when mothers cannot produce sufficient quantities themselves. For impoverished families, the free service eliminates financial barriers to accessing this essential nutrition.

Bethge's documentation highlights the human infrastructure behind this public health success. Staff members screen donors, operate pasteurization equipment, label bottles, and coordinate deliveries to hospitals. The work requires minimal equipment and training compared to pharmaceutical manufacturing, yet produces outcomes rivaling wealthy nations' programs.

Brazil's milk bank network demonstrates how organized donation systems can deliver medical-grade nutrition at scale. The model has attracted international attention from health agencies studying ways to expand similar programs in other developing countries. The network's efficiency and safety