Milk and milk products are dairy products that are derived from the milk of mammals, such as cows, goats, and sheep. Some common milk products include cheese, yogurt, butter, and ice cream. Milk is a good source of calcium, protein, and other essential nutrients, making it an important part of a balanced diet for many people. However, some individuals may be lactose intolerant or have allergies to milk proteins, so they may need to avoid or limit their consumption of milk and milk products.