Sinapis alba
Traditional counterirritant — mustard plasters for chest congestion and joint pain. Activates TRPA1 pain channels (warming sensation). TCM Bai Jie Zi for phlegm-cold in lungs. Culinary condiment with antimicrobial properties.
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None significant at culinary doses.
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Skin burns if poultice left too long. GI irritation. Safe as food.
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