Hard cheeses are a category of cheese that have a low moisture content, making them firm and dense. They are typically aged for longer periods, which enhances their flavor and texture. Common examples of hard cheeses include Parmesan, Pecorino, and Grana Padano. These cheeses are often grated or shaved and used in cooking or as toppings. The aging process for hard cheeses can range from several months to several years. During this time, they develop complex flavors and a crumbly texture. Hard cheeses are rich in protein and calcium, making them a nutritious addition to a balanced diet.