A protein bar is a convenient snack that is high in protein, often used by athletes and fitness enthusiasts to support muscle recovery and growth. These bars typically contain a mix of ingredients, including protein sources like whey protein, soy protein, or pea protein, along with carbohydrates, fats, vitamins, and minerals. Protein bars come in various flavors and textures, making them a popular choice for on-the-go nutrition. They can be consumed before or after workouts, or as a meal replacement. Many brands offer options that cater to specific dietary needs, such as gluten-free or vegan varieties.