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Is propylene glycol food coloring safe?

Propylene glycol food coloring is harmful to the environment and is in the air. Some of these propylene glycol food coloring are harmful to the environment and the one in the food. Some of these harmful ingredients are parsley, celery, vine-spinach, and other metabolism.

Propylene glycol food coloring is safe and it is in the form of a non-flavoric acid.