Calamus
(Acorus calamus)
Also know as Sweet flag
Botanical Information
Perennial herb which grows in wet swampy areas and has stiff, sword-shaped leaves. The tiny green flowers are in tall spikes.
Working with Calamus
Part(s) Used
Rhizome
Herb Forms
Tinctures, bulk herb
Christopher Hobbs:
“Calamus has a beneficial effect on the stomach and is taken as an appetite stimulant and for dyspepsia, gastritis, colic, flatulence, hyperacidity, and liver congestion. It is said to lessen the enjoyment of tobacco and is chewed when trying to break the nicotine habit. It is also taken as a tea for alcoholism. A few drops of calamus are sometimes given before meals to children with poor appetites.
Calamus has a taste of ACRID and a temperature of WARM.”
Calamus (Acorus calamus), also known as sweet flag, is a semi-aquatic, perennial plant traditionally used in herbal medicine for digestive, respiratory, and nervous system ailments. Its roots are aromatic and have been used for centuries in both Eastern and Western herbal practices.
Historical Uses
In ancient medicine, calamus root was often used for its stimulant and sedative properties, particularly in Ayurveda and Traditional Chinese Medicine. It was applied for gastrointestinal issues, as a nervine tonic, and to aid memory and cognitive functions. Native Americans and European herbalists also valued it for similar purposes, often using it to treat colds, fever, and digestive issues.
Modern Clinical Uses
Today, herbalists and naturopaths use calamus root primarily to support digestion, alleviate gastrointestinal discomfort, and calm the nervous system. It’s occasionally recommended as a remedy for anxiety, insomnia, and memory enhancement, though modern practitioners tend to be cautious due to potential toxicity concerns.
Chemistry
Calamus root contains volatile oils, with the main active constituents being beta-asarone and alpha-asarone. Other constituents include acorenone, camphor, and eugenol. Beta-asarone, a potential carcinogen, is present in varying amounts depending on the plant’s origin; the European variety of calamus typically has lower beta-asarone levels than the Asian variety.
Pharmacology
Beta-asarone and other compounds in calamus are believed to have antispasmodic, sedative, and anti-inflammatory properties. However, beta-asarone is also a central nervous system depressant and is considered a potential carcinogen, especially in high doses or with prolonged use.
Clinical Trials
Limited clinical trials have been conducted on calamus, and those that do exist have primarily focused on its antispasmodic and cognitive benefits. The results are inconclusive, and much of the evidence supporting its use remains anecdotal. Some studies suggest mild efficacy in digestive support, but more research is needed.
Summary
While calamus has a long history of traditional use for digestion and calming effects, modern use is limited due to safety concerns. Its active compound, beta-asarone, has potential health risks, particularly with long-term use. Clinical evidence is scarce, and use should generally be approached with caution.
Generated by ChatGPT; edited by Christopher Hobbs.
Cautions
The FDA has classified beta-asarone as a potentially carcinogenic compound, leading to a ban on calamus-containing food additives in the U.S. European calamus, which has lower beta-asarone content, is sometimes considered safer, but its use is still advised with caution. High doses or extended use are not recommended, especially in children or pregnant women.
Due to its potential toxicity, dosing for calamus should be approached cautiously. When used, calamus is often administered as a tincture or tea, with small amounts (usually 0.5–2 grams of root daily) recommended in many herbal traditions. It is typically combined with other herbs to minimize toxicity.
Conditions treated with Calamus
Condition
Treatment Support
Application
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Dosages
Decoction
0.5–2 grams of root daily
Tincture
0.5–2 grams of root daily
The information given here is designed to help you make informed choices about your health. The information is drawn from numerous sources—both traditional medicine practice, from the clinical experience of many herbalists currently practicing, and supported by decades of scientific research from the author. The research most consulted includes human clinical trials that help to determine the most effective and safe herbs for various needs, the best doses, and types of preparations.
The information offered in this database is not intended as a substitute for any that may have been prescribed by your health practitioner or physician.