Milk-based foods are products made primarily from milk, which is a nutritious liquid produced by mammals. Common examples include cheese, yogurt, and butter. These foods are rich in essential nutrients like calcium, protein, and vitamins, making them important for a balanced diet. The process of making milk-based foods often involves fermentation or aging. For instance, yogurt is created by adding specific bacteria to milk, which helps it thicken and develop a tangy flavor. Similarly, cheese is made by curdling milk and separating the solids from the liquid, resulting in a variety of textures and tastes.