First of all, they elevate your blood glucose (sugar) levels in a safe, gentle manner and keep them up longer than most foods. The practical effect of this is to leave you feeling satisfied longer, say researchers.
Secondly, they’re one of the richest sources of soluble fiber in the supermarket. This type of fiber prevents hunger pangs by guarding against dangerous swings or drops in your blood sugar level, says Dr. James Anderson of the University of Kentucky’s School of Medicine. An average size apple provides only 81 calories and has no sodium, saturated fat or cholesterol. You’ll also get the added health benefits of lowering the level of cholesterol already in your blood as well as lowering your blood pressure.