Sodium and chloride levels have been increased slightly, to 1,640 mg and 2,300 mg, respectively. In the past, Soylent has not fully met the Institute of Medicine’s recommended sodium intake levels, due to the challenges of providing recommended daily sodium values without creating an unpleasantly salty flavor. > > Thanks to the addition of isomaltulose, Soylent 1.4 can now meet the IOM’s recommended levels for sodium and chloride while maintaining a balanced flavor profile.

I should point out, here, that the IOM's recommendation is controversial, and that many would consider 1.64g sodium per day to still be inadequate. (Luckily, getting sodium elsewhere is easy.)