The phrase "coloring agents" refers to substances or materials that are used to add color to things, such as food, clothing, or other products. Full definition
They use no chemicals, preservatives, dyes or coloring agents in any of their products! (mydoglikes.com)
Unfortunately, many of the pet foods on the market contain things like artificial coloring agents and sweeteners, grain fillers, and animal by - products. (holisticveterinaryhealing.com)
If you have recently consumed food dyes, food coloring agents, iron supplements, some types of medications and green vegetables. (primehealthchannel.com)