A medium slice of pan-fried or broiled bacon that weighs 0.3 ounces has approximately 46 calories. It also contains 3.6 grams of fat, 196 milligrams of sodium, 9 milligrams of cholesterol and 3.1 grams of protein.
Because bacon contains fats, sodium and cholesterol, it may not be a healthy choice as a breakfast food if serving portions are large. Similarly, most of the calories from bacon come from its fat content. A diet that is high in saturated fats, sodium and cholesterol may increase a person's risk factor for either heart disease or stroke.
Another problem associated with pork bacon is that it is a processed meat product that contains nitrates. Although many researchers do not know the direct link between nitrates and cancer, they believe that regularly consuming processed meats with nitrates may increase a person's risk for cancer.