Milk is a nutrient-rich beverage produced by mammals, primarily consumed by humans. It offers a wide range of uses and benefits due to its nutritional composition and versatility. Milk is a rich source of high-quality protein, containing all essential amino acids necessary for human health. Casein and whey are the two main types of proteins found in milk. Milk is an excellent source of calcium, crucial for maintaining strong bones and teeth, as well as supporting muscle function, nerve transmission, and hormonal secretion. It provides essential vitamins such as vitamin D (important for calcium absorption), vitamin A (important for vision and immune function), and B vitamins (important for energy metabolism and nervous system health).