Qing Dai

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.).

Not to be confused with Qingdao.

Qingdai was first recorded in Yaoxinglun.

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