Breast milk is the gold standard for infant nutrition. Because of its unique composition, particularly the quality and quantity of proteins, breast milk provides the ideal nutrition to support an infant’s healthy growth and development. The first 1000 days of an infant’s life is a critical window for development, and nutrition during this period can influence metabolic programming. An excess of certain types of amino acids required in early nutrition can cause early weight gain and lead to obesity. Therefore, a right quality and quantity of proteins is important for an optimal development.