Pecan nuts are a rich source of dietary fiber that helps facilitate regular bowel movements and promote colon health. Therefore, regular consumption of pecan nuts is beneficial for digestive health. Dietary fiber in pecan nuts is also useful in preventing some forms of cancer and alleviating risks associated with heart diseases. Eating pecan nuts makes you feel full in a short time and increases metabolism. Therefore, they make for a perfect snack for weight loss programs. Oleic acid present in pecan nuts helps reduce risks associated with breast cancer.