High fat content. Each 100 grams of pork skin contains 363 calories, of which 28.1 grams of fat, 27.4 grams of protein, 10.7 grams of saturated fatty acids in fat, 15.2 grams of monounsaturated fatty acids, polyunsaturated fatty acids 0.9 grams of cholesterol 100 milligrams, 3 micrograms of vitamin A, 72 milligrams of sodium and so on, which is high in fat content is the main reason for the calorie of the pork skin jelly high. Pork skin jelly is a traditional specialty made of boiled pork skin, belonging to the cold dishes, because it is cooled and eaten, so it is called pork skin jelly.