FD&C Blue 2
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What it is
FD&C Blue 2 is a synthetic color additive, also known as Indigo Carmine. It is made from indigo, a natural dye, through a chemical process that modifies its structure to make it suitable for food use.
Why it's used
This ingredient is used to give foods a blue color. It is commonly found in candies, baked goods, cereals, and beverages to enhance their visual appeal.
Health notes
In the United States, FD&C Blue 2 is an FDA-approved color additive. In April 2025, the FDA announced a plan to phase out petroleum-based synthetic dyes, including FD&C Blue 2. JECFA has evaluated this additive and set an acceptable daily intake. EFSA has also evaluated it and concluded it is safe at established levels. Some studies have suggested a possible link between synthetic food colors, including Blue 2, and hyperactivity in some children, though evidence is mixed and more research is ongoing.
Allergen info
Not a major allergen.
Products containing FD&C Blue 2
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