How do you find out if a pork loin roast is cooked thoroughly?

A pork loin roast is cooked thoroughly when its internal temperature is at least 145 degrees Fahrenheit, as measured with a food thermometer before removing the pork from the cooking source. Let the meat rest for at least three minutes before carving and serving.

To roast a boneless or bone-in pork loin roast that weighs between 2 and 5 pounds, preheat the oven to 350 F. Place the meat in a shallow pan, and roast uncovered for about 20 minutes per pound or until the minimum internal temperature is reached. Even when cooked thoroughly, some pork may appear pink in the center.