Ebernia Prunasti, Évernia, Evernia prunastri, Évernie, Lichen Oak Moss, Mousse de Chêne, Musgo de Roble, Oakmoss, Tree Moss.


Overview Information

Oak moss is a species of moss that grows on oak trees. The moss is used to make medicine.

Oak moss is used for disorders of the stomach and intestines, but there is no good scientific research to support this use.

In manufacturing, oak moss is used as a fragrance in perfumes.

Oak moss is sometimes called tree moss, but so are other products. Avoid confusion by looking for the scientific name, Evernia prunastri.

How does it work?

There isn't enough information to know how oak moss might work as a medicine.


Uses & Effectiveness?

Insufficient Evidence for

More evidence is needed to rate the effectiveness of oak moss for these uses.

Side Effects

Side Effects & Safety

When taken by mouth: Oak moss is POSSIBLY SAFE for most people when taken for short periods of time as a water-based tea. When taken in large amounts, for long periods of time, or as an alcohol extract, oak moss is LIKELY UNSAFE. Oak moss contains a toxic chemical called thujone. It can cause side effects such as restlessness, vomiting, dizziness, tremors, kidney damage, and convulsions.

When applied to the skin: There isn't enough reliable information to know if oak moss is safe. It might cause allergic reactions, including skin rash, in some people.

Special Precautions & Warnings:

Pregnancy and breast-feeding: It's POSSIBLY UNSAFE to take oak moss if you are pregnant. It contains a chemical called thujone that might cause the uterus to contract, and this could cause a miscarriage.

Allergy to lichens and mosses: If you are allergic to lichens and mosses, you might also be allergic to oak moss. It's best to avoid oak moss if you have one of these allergies.

A blood disorder called porphyria: Oak moss might make this condition worse. Don't use oak moss if you have porphyria.

Kidney problems: Oak moss might make this condition worse. Don't use oak moss if you have kidney problems.



We currently have no information for OAK MOSS Interactions.



The appropriate dose of oak moss depends on several factors such as the user's age, health, and several other conditions. At this time there is not enough scientific information to determine an appropriate range of doses for oak moss. Keep in mind that natural products are not always necessarily safe and dosages can be important. Be sure to follow relevant directions on product labels and consult your pharmacist or physician or other healthcare professional before using.

View References


  • Calchera A, Dal Grande F, Bode HB, Schmitt I. Biosynthetic gene content of the 'perfume lichens' Evernia prunastri and Pseudevernia furfuracea. Molecules 2019;24(1):203. View abstract.
  • Dahlquist I, Fregert S. Contact allergy to atranorin in lichens and perfumes. Contact Dermatitis 1980;6:111-9. View abstract.
  • Goncalo S, Cabral F, Goncalo M. Contact sensitivity to oak moss. Contact Dermatitis 1988;19:355-7. View abstract.
  • Goncalo S. Contact sensitivity to lichens and compositae in Frullania dermatitis. Contact Dermatitis 1987;16:84-6. View abstract.
  • Thune P, Solberg Y, McFadden N, et al. Perfume allergy due to oak moss and other lichens. Contact Dermatitis 1982;8:396-400. View abstract.

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CONDITIONS OF USE AND IMPORTANT INFORMATION: This information is meant to supplement, not replace advice from your doctor or healthcare provider and is not meant to cover all possible uses, precautions, interactions or adverse effects. This information may not fit your specific health circumstances. Never delay or disregard seeking professional medical advice from your doctor or other qualified health care provider because of something you have read on WebMD. You should always speak with your doctor or health care professional before you start, stop, or change any prescribed part of your health care plan or treatment and to determine what course of therapy is right for you.

This copyrighted material is provided by Natural Medicines Comprehensive Database Consumer Version. Information from this source is evidence-based and objective, and without commercial influence. For professional medical information on natural medicines, see Natural Medicines Comprehensive Database Professional Version.
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