Isatis tinctoria
TCM antiviral powerhouse — Ban Lan Gen is the most commonly used herb in China for sore throats and flu. During SARS and COVID, sales exploded. Contains indirubin (anti-leukemic compound). Also the source of blue woad dye.
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Immunosuppressants.
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GI upset, diarrhea (very cold nature in TCM). Allergic reactions.
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