Human vs Cow Milk: Nutritional Composition and Health Implications for Infants
Human milk is universally recognized as the optimal source of nutrition for infants, providing a unique balance of macronutrients, micronutrients, and bioactive compounds essential for growth and immune development. In contrast, cow milk, though widely consumed globally, differs significantly in composition and physiological effects, raising concerns when introduced early in infant diets. This review synthesized current evidence comparing human and cow milk, focusing on nutritional composition, immunological properties, digestibility, and health implications. Human milk contains lower protein but with superior digestibility, higher lactose that supports calcium absorption and gut microbiota, and essential fatty acids such as DHA and ARA critical for brain development. It also delivers immunological protection through antibodies, lactoferrin, lysozyme, and oligosaccharides, which are largely absent in cow milk. Conversely, cow milk presents higher protein and mineral loads that may stress infant kidneys, limited vitamin C, and poor iron bioavailability, predisposing infants to anemia and allergies. This review further explored public health perspectives, emphasizing breastfeeding promotion and the risks of premature cow milk introduction. Findings reinforce human milk as the gold standard for infant feeding, while highlighting the need for cautious use of cow milk and improved infant formula development to bridge nutritional gaps. Future research should focus on replicating bioactive components of human milk in substitutes to enhance infant health outcomes.
Keywords: Human milk, Cow milk, Infant nutrition, Immunological benefits, Health implications
