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Blue 1
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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.
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Blue 1

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Symptoms

  • Hives
  • Itching
  • Swelling
  • Difficulty Breathing
  • Nausea or Vomiting
  • Headache
  • Anaphylaxis (severe reaction)

Healing & Prevention

  • Avoidance of Blue 1
  • Antihistamines
  • Epinephrine (for severe reactions)
  • Hydration
  • Cold compress
  • Consult an Allergist
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