Protein-based foams are materials created by incorporating proteins, such as those from soybeans or milk, into a foam structure. These foams are formed by whipping air into a protein solution, which stabilizes the bubbles and creates a light, airy texture. They are often used in food products, cosmetics, and packaging due to their biodegradable nature. These foams can also serve as alternatives to traditional petroleum-based foams, offering a more sustainable option. Their unique properties, such as flexibility and thermal insulation, make them suitable for various applications, including biodegradable packaging and food products like whipped toppings.