The pecan is a nut from a species of hickory trees native to northern Mexico and the southern United States. The nut is a nutrition powerhouse loaded with vitamins and minerals.Raw pecans are cholesterol-free, sodium-free, and low in carbohydrates. With their rich, buttery flavor and natural sweetness, they make a tasty and satisfying snack. Pecans are rich in many vitamins and minerals important for healthy skin, eyes, teeth, bones, muscles, and nerves.