Qingdai (青黛) or Qing Dai, a traditional Chinese medicine, is derived from dried leaves and stems of Baphicacanthus cusia (Nees) Bremek., Polygonum tinctorium Ait., or Isatis indigotica Fortune (Fort.).

Qingdai was first recorded in Yaoxinglun.

See also Indirubin Realgar/Indigo naturalis Indigo naturalis

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