Blue flag's therapeutic uses
Blue flag, a plant from the iris family (Iris versicolor), is traditionally recognized for its various therapeutic applications, particularly in North America. Historically utilized by Indigenous Americans and later by 19th-century Eclectic physicians, it has been employed for digestive issues, liver health, and immune system support. The rhizome of blue flag is the primary part used medicinally, and topical preparations have been applied to treat skin infections like impetigo. Some herbalists advocate for its use in promoting bowel movements and increasing urine output, addressing conditions such as constipation and fluid retention. However, it is important to note that blue flag has not been subjected to rigorous scientific research to validate these uses, and its safety remains a concern due to potential side effects, including gastrointestinal distress. Furthermore, it is deemed unsafe for certain populations, including pregnant or nursing women and young children. Despite its historical use, caution is advised, and further clinical studies are warranted to substantiate its therapeutic claims.
Blue flag's therapeutic uses
DEFINITION: Natural plant product used to treat specific health conditions.
PRINCIPAL PROPOSED USES: None
OTHER PROPOSED USE: Impetigo, laxative and diuretic, skin conditions, liver and digestive health, immune system support
Overview
Blue flag, a member of the iris family, is found throughout North America. It was widely used by Indigenous Americans for digestive problems. In the nineteenth century, physicians of the Eclectic school of medicine also used blue flag for digestive problems and to treat thyroid enlargement, enhance immunity, stimulate the liver, and “detoxify” the body. Topical preparation of the herb was used for impetigo (a skin infection caused by Streptococcus bacteria). The rhizome (underground stem) is the part used medicinally.
Blue flag has undergone no meaningful scientific study. Given the lack of documented benefits, the absence of toxicity studies, the toxicity of related species, and the known side effects, this herb is not recommended.
Therapeutic Dosages
A typical dosage is 1 to 2 grams three times daily.
Therapeutic Uses
Some herbalists use blue flag to treat liver problems and skin diseases. However, there has been no meaningful scientific evaluation of its efficacy. Blue flag root has also been used to create a salve to treat impetigo. It contains isophthalic acid, iridin, and the volatile oil furfural.
Other traditional therapeutic uses of the blue flag have included promoting bowel movements and increasing urine output, aiding in constipation and fluid retention. Blue flag's inflammatory properties have also been posited as potentially helpful in treating eczema, psoriasis, and acne when applied topically. Still, theories on blue flag’s medical usefulness are based on anecdotes, traditional medicine, and animal studies. Double-blind, placebo-controlled human clinical trials are necessary.
Safety Issues
Blue flag has not undergone any meaningful scientific study. High doses of blue flag are known to cause severe gastrointestinal upset, including nausea, vomiting, and diarrhea, and related species are known to be toxic. The fresh herb can irritate the mouth and stomach. Blue flag is considered unsafe for use by pregnant or nursing women and young children.
Bibliography
"Blue Flag: Health Benefits, Side Effects, Uses, Dose & Precautions." RxList, www.rxlist.com/supplements/blue‗flag.htm. Accessed 6 Sept. 2024.
"Blue Flag - Uses." Kaiser Permanente, 2023, wa.kaiserpermanente.org/kbase/topic.jhtml. Accessed 16 Aug. 2023.
Felter, Harvey Wickes. The Eclectic Materia Medica, Pharmacology and Therapeutics. Cincinnati: John K. Scudder, 1922.
Newall, C., L. Anderson, and J. Phillipson. Herbal Medicines: A Guide for Healthcare Professionals. London: Pharmaceutical Press, 1996.