Protein smoothies are blended drinks that combine various ingredients to provide a rich source of protein. They typically include a base like milk, yogurt, or plant-based milk, along with protein sources such as protein powder, nut butter, or Greek yogurt. Fruits and vegetables can also be added for flavor and nutrition, making them a popular choice for a quick meal or snack. These smoothies are often consumed by athletes and fitness enthusiasts to support muscle recovery and growth. They can be customized to fit individual dietary needs and preferences, making them versatile and convenient for anyone looking to increase their protein intake.