Blue flag has undergone no meaningful scientific study. In view of the lack of documented benefits, the absence of toxicity studies, the toxicity of related species, and the known side effects, we recommend against the use of this herb.
What Is Blue Flag Used for Today?
Blue flag is used by some herbalists today to treat liver problems and skin diseases. However, there has been essentially no scientific evaluation of the efficacy of this herb. It is thought to contain isophtalic acid, iridin, and the volatile oil furfural.
- Reviewer: EBSCO CAM Review Board
- Review Date: 09/2014 -
- Update Date: 09/18/2014 -