Liverwort Drug Interactions, Uses, Effectiveness, Safety & More

Liverwort is a common name used for more than one plant, which can cause confusion. In herbal medicine, the name often refers to Anemone hepatica (also called Hepatica or American Liverleaf), a small flowering plant in the buttercup family that grows in woodland areas of Europe and North America. The name "liverwort" can also be used for the tiny non-vascular bryophyte plants found on damp ground, which are a different group of organisms.

The herbal Anemone hepatica got its name because its three-lobed leaves were thought to look like the human liver. Following an old idea called the "doctrine of signatures," people once believed a plant shaped like an organ could treat that organ. Because of this, it was traditionally used for liver and gallbladder problems.

Today liverwort is mostly of historical and folk interest. It is sometimes sold as a dried herb, tea, or tincture, but it is not a widely used or well-studied supplement.

Plants in the Anemone group contain a compound called protoanemonin, which forms when the fresh plant is crushed or damaged. Protoanemonin is known to irritate the skin and the lining of the mouth, throat, and stomach. When the plant is dried or aged, this compound changes into a less irritating substance called anemonin.

Liverwort also contains other plant compounds such as flavonoids and tannins, which are common in many herbs. Any proposed effects on digestion or the liver are based mainly on traditional ideas and limited laboratory research, not on proven actions in people.

In short, the way liverwort might affect the body in humans is not well understood, and its supposed benefits have not been confirmed by good scientific studies.

The biggest safety concern with liverwort is that the fresh plant can irritate the skin, mouth, throat, and digestive tract because of protoanemonin. For this reason, only properly dried plant material should ever be used. Handling or eating the fresh plant may cause burning, blistering, or stomach upset.

People with existing liver or gallbladder disease should be especially careful and should not use liverwort without medical advice, since it is unproven and could be harmful. Anyone with allergies to plants in the buttercup family should also avoid it.

Pregnancy and breastfeeding: There is not enough reliable safety information for these groups. To be safe, liverwort should be avoided during pregnancy and while breastfeeding. Always check with a pharmacist or doctor before using any herbal product if you are pregnant, nursing, or giving it to a child.

The most likely side effects come from the irritating effect of the fresh or poorly dried plant. These can include burning or tingling in the mouth and throat, mouth and skin irritation, nausea, vomiting, and stomach pain.

Contact with the fresh plant or its juice can cause skin redness, itching, or blistering. Taking large amounts could lead to more serious digestive and kidney irritation. Allergic reactions are also possible, especially in people sensitive to other buttercup-family plants.

If you notice severe mouth or stomach pain, persistent vomiting, a rash, or trouble breathing, stop using it and seek medical care.

There is no established or standardized dose for liverwort. Because it has not been studied in proper clinical trials, no safe and effective amount has been confirmed.

If you choose to use a product that contains liverwort, follow the directions on the label and use only properly dried material, never the fresh plant. It is best to start with the lowest amount suggested and to ask a pharmacist or doctor first.

Do not give liverwort to children, and avoid it if you are pregnant or breastfeeding. When in doubt, choose better-studied options with a clearer safety record.