Companies make packaged food without synthetic dyes in other countries. But despite pressure from Robert F. Kennedy Jr., the change isn’t likely to happen quickly in the United States.

Claims have been made that food dyes like Red Dye 40 and Yellow Dye 5 can cause serious side effects like cancer, allergies, ...

The U.S. Food and Drug Administration announced it is urging food manufacturers to start reducing or eliminating the use of ...