Concern that one of the most commonly-consumed food colorings may cause cancer has led to changes in soft drink formulation in California.
Nota del Doctor
There’s another class of additives that the soda industry uses to make its soda brown; see Phosphate Additives in Meat Purge and Cola.
The meat industry has also used potentially toxic additives for cosmetic purposes: arsenic-containing drugs to make chicken pink (see Arsenic in Chicken). Phosphate Additives in Chicken also help maintain the color of poultry. Carbon monoxide is used to keep red meat red, while canthoxanthine keeps salmon pink (see Artificial Coloring in Fish).
The junk food industry uses titanium dioxide to whiten processed foods (see Titanium Dioxide & Inflammatory Bowel Disease). It’s amazing the risks the food industry will take to alter appearances (see Artificial Food Colors & ADHD).