The primary nutrient found in milk is calcium. It is essential for developing and maintaining strong bones and teeth, playing a crucial role in bone health throughout life. Milk also contains other vital nutrients such as protein, vitamin D, riboflavin, and potassium, making it a complete food for people of all ages. The calcium in milk is easily absorbed by the body, which is one reason why dairy products are often recommended as part of a balanced diet. Alternate sources of calcium include leafy greens, fortified foods, and supplements for those who are lactose intolerant or do not consume dairy.