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Blue 1
Blue 1 (E133) is a synthetic dye with extremely rare reports of hypersensitivity reactions (e.g., skin rashes). Not recognized as an allergen by FDA/EFSA, though some individuals may experience non-allergic intolerance symptoms.
Symptoms
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Hives
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Itching
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Swelling
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Difficulty Breathing
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Nausea or Vomiting
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Headache
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Anaphylaxis (severe reaction)
Healing & Prevention
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Avoidance of Blue 1
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Antihistamines
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Epinephrine (for severe reactions)
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Hydration
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Cold compress
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Consult an Allergist