Tell me about...
Usnea
What is usnea? What is it used for?
Usnea is not an herb, but a lichen — a plant consisting
of a fungus combined with a blue-green algae. It is found
in the forests of Europe and North America, where it grows
in long, fuzzy strings that hang from tree branches. The lichen's
fuzzy appearance has helped give usnea the nickname of "old
man's beard."
Usnea's main ingredient is usnic acid, which gives the
plant an incredibly bitter taste. Because of its taste, usnea
has been historically used to treat indigestion. Usnea also
contains mucilage, which can be helpful in easing coughs.
Preliminary test-tube studies have suggested usnic acid may
fight certain types of cancer.
How much usnea should I take?
In capsule form, many herbalists recommend taking 100mg
of usnea TID. Other practitioners suggest 3-4ml of an usnea
tincture TID.
What forms of usnea are available?
Usnea capsules and tinctures are readily available at many
health food stores. Whole dried usnea can be found at several
specialty food stores.
What can happen if I take too much
usnea? Are there any interactions I should be aware of? What
precautions should I take?
To date, there are no known side effects from taking usnea.
It is considered safe for children. In addition, there is
no current evidence of adverse drug reactions with usnea.
Other Resources :
The
More You Know About Nutrition
References
- Evans WC. Trease and Evans' Pharmacognosy,
13th ed. London: Baillière Tindall, 1989, 643.
- Gruenwald J, Brendler T, Jaenicke C, et
al. (eds). PDR for Herbal Medicines. Montvale, NJ:
Medical Economics, 1998, 1199—200.
- Okuyama E, Umeyama K, Yamazaki M, Kinoshita
Y, Yamamoto Y.
- Usnic acid and diffractaic acid as analgesic
and antipyretic components of Usnea diffracta. Planta
Med April 1995;61(2):113-5.
- Tilford GL. Edible and Medicinal Plants
of the West. Missoula, MT: Mountain Press Publishing
Company, 1997, 148—9.
- Weiss RF. Herbal Medicine. Beaconsfield,
UK: Beaconsfield Publishers Ltd., 1988, 49.
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