The main nutrient found in milk is calcium. It is a vital mineral that plays a crucial role in numerous bodily functions, particularly in maintaining strong bones and teeth. Additionally, calcium is essential for nerve transmission, muscle function, and blood clotting. Milk is also rich in other nutrients, including protein, phosphorous, and vitamins D and B12. Consuming milk and dairy products is an effective way to meet daily calcium requirements, which is especially important during growth periods in childhood and adolescence, and for maintaining bone health in older adults.