Blue Food Dye Allergy Symptoms. How can you tell if you're reacting to red dye 40? Symptoms of food dye sensitivity and allergies often get overlooked by both parents and doctors.
The most significant known blue 1 side effects is its potential to cause allergic reactions, including skin rashes, hives, or nasal congestion in sensitive individuals. In the us, most blue coloring comes from blue no.
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