Cow's milk is a nutrient-rich liquid produced by female cows, primarily used as a food source for humans and calves. It contains essential nutrients such as calcium, protein, and vitamins like vitamin D and B12, making it beneficial for bone health and overall growth. In addition to being consumed directly, cow's milk is a key ingredient in many dairy products, including cheese, yogurt, and butter. It can be found in various forms, such as whole, skim, or low-fat, catering to different dietary preferences and needs.