The weight percentage of peanuts in a nut roll candy bar is approximately inversely proportional to the cubed root of the candy bar's weight. That implies that "snack sized" Payday candy bars are healthier to eat than regular sized Payday candy bars. Of course, the manufacturer, Hershey, doesn't want you to know that because then they won't be able to sell as many regular sized Payday candy bars.
Small nut roll candy bars, such as snack sized Payday, are the healthiest things that you can give to trick or treaters without them complaining by throwing eggs at your house. Don't believe me and give them apples and see what happens.