Why cooking food an irreversible change?

Cooking food is an irreversible change because it involves chemical reactions that transform the food's components. These reactions break down complex molecules into simpler ones, transforming the texture, flavor, and appearance of the food. For example, when meat is cooked, the proteins denature and the fats melt, making it more tender and flavorful. Similarly, when vegetables are cooked, the cellulose breaks down, making them softer and easier to digest. These chemical changes are irreversible, and cannot be undone.