Artificial Color

A color additive is any dye, pigment or substance which when added or applied to a food, drug or cosmetic, or to the human body, is capable (alone or through reactions with other substances) of imparting color.

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Certain artificial food colorings can cause adverse effects in people who have sensitivities to them. 

No research has directly linked consumption of artificial food coloring to increased risk of cancer. However, the Center for Science in the Public Interest condemns most relevant studies for having several major limitations. First, it claims that the studies may have an inherent bias because they are conducted or commissioned by food dye manufacturers. It also criticizes the studies because most haven't lasted longer than two years, making them less likely to find a correlation between the dyes and development of cancer years down the line. Another problem the group finds with the studies is that they only evaluate the safety of individual dyes when a single food or beverage may contain multiple dyes that could negatively interact with each other. The Center for Science in the Public Interest points out that the three dyes used most frequently -- Red 40, Yellow 5 and Yellow 6 -- contain compounds that have been linked with cancer.

No evidence confirms that artificial food coloring causes attention-deficit/hyperactivity disorder, or ADHD, but more research has linked certain colorings to hyperactivity in children

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