FORUM: Questions from the readers

4) What is yellow no. 5, and is it harmful?

Yellow no. 5 is a coloring that is used in foods to make it look more appealing to consumers (you and me). However, in 1986 the Food and Drug Administration (FDA) found that fewer than 1 in 10,000 people had an allergic reaction to the food dye. The allergic reactions are typically mild and symptoms were usually hives.

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