London broil, a steak dish, is made with top round. Although London broil is not as lean as chicken breast, it is lower in fat and calories than some other types of steak and can be enjoyed in moderation if you assess the nutrition facts.
The online nutrition database MyFitnessPal notes that a 4 oz. serving of London broil contains 190 calories. MayoClinic.com indicates that it would take more than an hour of walking to burn off all of the calories in 4 oz. of London broil.
A 4 oz. serving of London broil contains 9 g of fat, according to MyFitnessPal, including 4 g from saturated fat. Although fat is necessary for proper health, the USDA recommends limiting saturated fat intake to just 10 percent of your daily calories.
The main source of calories in London broil is protein. MyFitnessPal states that a 4 oz. serving of London broil contains 25 g of protein.