The U.S. Food and Drug Administration's (FDA) decision to phase out Red Dye 3, a synthetic ingredient that gives food and beverages a vibrant red color, already appears to be altering consumer behavior: They’re buying less of the stuff.

The FDA's move stops short of the outright ban that had been floated for in Kennedy's "Make America Healthy Again" platform from the campaign trail. Instead, it relies on what the Department of Health and Human Services said was a "national standard and timeline for the industry" to voluntarily make the switch.

Claims have been made that food dyes like Red Dye 40 and Yellow Dye 5 can cause serious side effects like cancer, allergies, and also hyperactivity in children. What are the side