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al·ka·net(al'kă-net), [C.I. 75530, 75520]
The root of an herb, Alkanna, or Anchusa tinctoria (family Boraginaceae), that yields the red dyes alkannan and alkannin; used as a coloring agent; also used, combined with tannin, as an astringent.
A biennial herb said to have antibiotic and wound-healing properties; other claims for efficacy include antidepressive, antipyretic, antitussive, astringent, diuretic, emollient and expectorant effects, and it is promoted as a blood purifier.
There is no peer-reviewed data to support alkanet’s efficacy.
Alkanna tinctoria; roots of this herb are prepared for purported value as a topical astringent.