Encyclopedia of Food and Color Additives - George A. Burdock - Google Books

https://books.google.de/books?id=iNzG8PoyW4AC&pg=PA320#v=onepage

A 3-volume reference set you'll use every day.• Suppose you are the regulatory affairs manager for a food company, and your boss calls about "beet red", a coloring agent touted by a salesman as "natural". Your boss needs to know if this claim is true.…