Pears pack a nutritional punch! A medium sized pear (about 166 grams) is a nutrient-dense food that contains only 100 calories, and is fat free. A nutrient-dense food is any food that provides vital nutrients (such as vitamins and minerals), but relatively few calories.ear Nutrition. Pears are among the most popular fruits in the world, and it’s no wonder why! They are an excellent source of fiber and a good source of vitamin C for only 100 calories per serving. And, they’re sodium free, fat free, and cholesterol free. That’s a lot of nutrition in one sweet and juicy package!