As the federal governing administration moves to improve rules for what food items can activity “healthful” labels, companies are pushing again. Some of the most significant makers of cereals, frozen and packaged foods have submitted dozens of promises to the Foodstuff and Drug Administration objecting to new policies that would exclude food with superior quantities of extra sugar and salt from being labeled as “healthier” on packaging. Some makers have even called the restrictions unconstitutional, expressing they violate companies’ Very first Amendment rights.  The Fda very last fall moved to update its prerequisites around what meals can use the phrase “nutritious” on packaging — the first improve since the rule…