For pork loin, it's a lean cut of meat without any marbling or fat content. It's exceptionally tender, even though it doesn't have marbling. This cut can be used for a wide variety of dishes and is suitable for individuals who are watching their calorie intake or trying to lose weight. It's not very high in calories. Although pork loin can be used for various recipes, it may not be ideal for slow-cooking because it's already tender. If you cook it for an extended period, it could become too soft. When purchasing pork loin, look for a piece with a light pink color and no visible discolorations.