Da Qing Ye is the indigo-yielding leaf of Isatis tinctoria, prized in TCM for clearing heat, resolving toxicity, and treating febrile infections with sore throat and epidemic diseases. Its distinctive indigo and indirubin pigments give it potent antimicrobial and anti-inflammatory properties valued across Chinese herbalism for acute respiratory conditions.
leaf, root
decoction, powder, tea, tincture
9–15g dried leaf as decoction daily; 3–6g powder in capsules or tea 2–3x daily
Cold in nature — use with harmonizing herbs. Generally safe.
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