Blue 2 is a synthetic royal blue dye used in food, cosmetics, personal care products, pharmaceuticals, and medical devices.
Sources of Exposure: Cosmetics and personal care products, food, and medications.
Health Impacts: Blue 2 has shown developmental toxicity in high doses, effects on neurobehavior, and effects on blood pressure. This synthetic dye can be harmful if swallowed, cause an allergic skin reaction, and is toxic to aquatic life with long-lasting effects.