Retailers are preparing for changes to the supplemental nutrition assistance program (SNAP) that will limit the purchase of junk food. The new rules, which will affect residents in several states, including Indiana, Iowa, and Florida, will prohibit the use of SNAP benefits to buy certain items such as candy and sugary drinks. The number of states implementing these changes is reported to be between 3 and 18, with some outlets specifying that the rules will take effect in five states.