The main source of protein in a typical American breakfast varies, but eggs are one of the most common choices. Eggs are valued for their high-quality protein content, providing all essential amino acids that the body needs for growth and repair. Other protein sources frequently found in American breakfasts include bacon, sausage, yogurt, and breakfast meats, as well as plant-based options like nuts and seeds. The inclusion of protein in breakfast is important as it helps support satiety, muscle maintenance, and energy levels throughout the morning, contributing to overall health and well-being.