Milk is among the most researched animal products, counting more evidence available than any other animal-source food. Yet important challenges and knowledge gaps still exist; it presents nevertheless a wealth of opportunities to leverage nutrition, quite often context-specific. This chapter covers the contribution of milk to nutrition and health, as well as the potential for expansion of milk in low- and middle-income countries, the barriers and enablers to such expansion, and surrounding issues related to sustainability and trade-offs.
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