Physiological Impact of Milk on Multiple Health Outcomes in Human

Milk is best known as a nutrient-rich fluid produced by the mammary glands of mammals, designed primarily to feed young. In the human diet, cow milk is most prevalent, but milk of other mammals and plant milk are common too. This study aims to investigate milk's nutritional value in various age groups and review opposing evidence of its effect on cardiovascular diseases in adults. It is a literature-based strategy to synthesize information from observational and meta-analytic studies. The milk content—macronutrients, vitamins, minerals—was compared to its role in maintaining growth, development, and well-being. In addition, evidence was reviewed on milk intake during adulthood and its link to cardiovascular wellness to assess risk relationships. Milk is rich in good-quality proteins, essential fatty acids, vitamins (A, D, B12), and minerals (calcium, phosphorus), beneficial for immune function, bone health, hydration, and weight control. Infants and children particularly gain advantage from its complete nutrient profile, while in adults, it contributes to muscle repair and cardiovascular health. Evidence regarding milk's role in cardiovascular disease (CVD) is contradictory. Some find a protective effect, while others report increased risk. Interestingly, a meta-analysis of prospective trials found that a daily consumption of 200 mL of milk was associated with a statistically significant reduction of CVD risk, even when whole milk was consumed. Milk remains an integral part of human nutrition due to its high nutrient content. Nonetheless, incongruent outcomes of its contribution to cardiovascular morbidity necessitate personalized dietary instructions. Further work should elucidate mechanisms for incongruent observations and provide concrete recommendations for milk intake for different ages and diseases.