Also known as E102, Tartrazine, FD&C Yellow 5, E110 or C.I. 19140. This is a synthetic additive derived from coal tar, used as a colourant. Pets don’t need colour added into their food, not only is it potentially harmful, but also completely unnecessary. Human consumption of yellow 5 can lead to various allergic reactions including anxiety, migraines, clinical depression, blurred vision, itching, general weakness, feeling of suffocation, purple skin patches, and sleep disturbance. In children, asthma attacks and hives have been claimed, including possible links to thyroid, tumors, chromosomal damage, hives, and hyperactivity.