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Usnea

Uses

Botanical names:
Usnea barbata

Parts Used & Where Grown

Usnea, also known as old man’s beard, is not a plant but a lichen—a symbiotic relationship between an algae and a fungus. The entire lichen is used medicinally. Usnea looks like long, fuzzy strings hanging from trees in the forests of North America and Europe, where it grows.

What Are Star Ratings?

This supplement has been used in connection with the following health conditions:

Used for Why
1 Star
Common Cold and Sore Throat
Refer to label instructions
Usnea has a traditional reputation as an antiseptic and is sometimes used for people with common colds.

Elderberry has shown antiviral activity and thus may be useful for some people with common colds. Elder flowers are a traditional diaphoretic remedy for helping to break fevers and promote sweating during a cold. Horseradish has antibiotic properties, which may account for its usefulness in easing throat and upper respiratory tract infections. The resin of the herb myrrh has been shown to kill various microbes and to stimulate macrophages (a type of white blood cell).  has a traditional reputation as an antiseptic and is sometimes used for people with common colds.

1 Star
Cough
Refer to label instructions
Usnea contains mucilage, which may be helpful in easing irritating coughs.

The mucilage of slippery elm gives it a soothing effect for coughs. also contains mucilage, which may be helpful in easing irritating coughs. There is a long tradition of using wild cherry syrups to treat coughs. Other traditional remedies to relieve coughs include bloodroot, catnip, comfrey (the above-ground parts, not the root), horehound, elecampane, mullein, lobelia, hyssop, licorice, mallow, (Malvia sylvestris),red clover, ivy leaf, pennyroyal (Hedeoma pulegioides, Mentha pulegium),onion, (Allium cepa), and plantain (Plantago lanceolata, P. major). None of these has been investigated in human trials, so their true efficacy for relieving coughs is unknown.

1 Star
Infection
Refer to label instructions
Usnea is an herb that directly attack microbes.

Herbs that directly attack microbes include the following: chaparral, eucalyptus, garlic, green tea, lemon balm (antiviral), lomatium, myrrh, olive leaf, onion, oregano, pau d’arco (antifungal), rosemary, sage, sandalwood, St. John’s wort, tea tree oil, thyme, and .

Traditional Use (May Not Be Supported by Scientific Studies)

Due to its bitter taste, usnea stimulates digestion and was historically used by herbalists to treat indigestion. It was also reportedly used over 3,000 years ago in ancient Egypt, Greece, and China to treat unspecified infections.1

How It Works

Botanical names:
Usnea barbata

How It Works

Usnic acid gives usnea its bitter taste and also acts as an antibiotic in test tube studies.2 Test tube studies have suggested an anti-cancer activity for usnic acid. However, this action has not been sufficient to warrant further investigation in humans.3 Usnea also contains mucilage, which may be helpful in easing irritating coughs. Again, this has not been studied in humans.

How to Use It

Usnea, 100 mg three times per day, can be taken in capsules.4 Tincture, 3–4 ml three times per day, can also be used.

Interactions

Botanical names:
Usnea barbata

Interactions with Supplements, Foods, & Other Compounds

At the time of writing, there were no well-known supplement or food interactions with this supplement.

Interactions with Medicines

As of the last update, we found no reported interactions between this supplement and medicines. It is possible that unknown interactions exist. If you take medication, always discuss the potential risks and benefits of adding a new supplement with your doctor or pharmacist.
The Drug-Nutrient Interactions table may not include every possible interaction. Taking medicines with meals, on an empty stomach, or with alcohol may influence their effects. For details, refer to the manufacturers’ package information as these are not covered in this table. If you take medications, always discuss the potential risks and benefits of adding a supplement with your doctor or pharmacist.

Side Effects

Botanical names:
Usnea barbata

Side Effects

There are no known side effects of usnea. It is considered safe for use in children. The safety of usnea during pregnancy and breast-feeding has not been established.

References

1. Tilford GL. Edible and Medicinal Plants of the West. Missoula, MT: Mountain Press Publishing Company, 1997, 148-9.

2. Weiss RF. Herbal Medicine. Beaconsfield, UK: Beaconsfield Publishers Ltd., 1988, 49.

3. Evans WC. Trease and Evans' Pharmacognosy, 13th ed. London: Baillière Tindall, 1989, 643.

4. Gruenwald J, Brendler T, Jaenicke C, et al. (eds). PDR for Herbal Medicines. Montvale, NJ: Medical Economics, 1998, 1199-200.

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How It Works
 

PeaceHealth endeavors to provide comprehensive health care information, however some topics in this database describe services and procedures not offered by our providers or within our facilities because they do not comply with, nor are they condoned by, the ethics policies of our organization.