Before you sprint out to the local fast food joint based on this title, please note that while it is true higher salt content in the diet of certain mice prevented weight gain, this points not to the drive through but to the importance of some nutrients within the body.
For the study, which was aimed at showing high fat and salt equal weight gain, mice were fed either normal chow or high fat chow with the addition of different levels of salt. Surprisingly the mice fed high fat and low salt gained the most weight while the high fat and high salt remained similar to the normal chow fed mice. So why did the salt work? It prevented fat absorption in the intestines and while no one it touting a high salt diet for the obese, the nutritional findings will give way to studying potential drugs to prevent fat absorption.