“Which would leave the stomach quicker, low fat, low protein meal or high fat, high protein meal?”

Fats are the slowest source of energy but the most energy-efficient form of food. Each gram of fat supplies the body with about 9 calories, more than twice that supplied by proteins or carbohydrates. Proteins consist of units called amino acids, strung together in complex formations. Because proteins are complex molecules, the body takes longer to break them down. As a result, they are a much slower and longer-lasting source of energy than carbohydrates. Consider a low fat, low protein meal – however, if you are looking to lose weight then protein is your friend!