Model Context Protocol (MCP)
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API Route
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L-Cysteine
L-Cysteine, often derived from duck feathers or human hair, can trigger IgE-mediated allergy in sensitive individuals. Symptoms include urticaria, angioedema, or asthma. Rare but documented in occupational or high-exposure settings (e.g., bakery workers).
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Symptoms
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Skin rash
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Hives
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Itching
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Swelling
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Nausea
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Vomiting
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Diarrhea
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Abdominal Pain
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Difficulty Breathing
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Anaphylaxis
Healing & Prevention
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Avoidance
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Antihistamines
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Epinephrine Auto-Injector
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Topical corticosteroids
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Hydration
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Medical Consultation
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Allergy Testing
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Emergency Action Plan