Wormwood sold in the United States is required to be thujone-free.
That means some supplement products may not contain what the label says.
However, the study did not suggest that wormwood on its own had any effect on rheumatoid arthritis.

zetat / iStock / Getty Images
It dropped out of favor due to severe side effects in people who drank the liquor absinthe.
Most studies investigating the use of wormwood in treating parasites have been in animals, with mostly positive results.
Wormwood didn’t work as well as Biltricide (praziquantel).
However, the findings are important becauseH.
Wormwood has demonstrated activity againstStaphylococcus aureus, the common bacteria that causes skin and soft tissue infections.
This includesmethicillin-resistantStaphylococcus aureus(MRSA), a dangerous form of staph infection.
Lab studies suggest that thujone can suppressC.
albicansand other disease-causing fungi.
A 2020 review suggested that wormwood may be effective againstCrohns disease, an inflammatory bowel disease.
Most commonly found in absinthe and vermouth.
the bitter-tasting perennial can be grown from seeds or purchased as a supplement and dried herb.
Unaltered wormwood contains significant amounts of thujone, a psychoactive chemical that can be toxic even in small amounts.
To be safe, test the oil on a small area and wait an hour or two.
There are no guidelines for the use of wormwood in any form.
Be sure to follow all recommended dosages on the product labels.
Overdosing can cause serious side effects.
The FDA lists wormwood as unsafe for internal use because it contains thujone.
The FDA requires all wormwood products sold in the United States to be thujone-free.
However, there’s not enough evidence that wormwood can treat or prevent any medical condition in humans.
Furthermore, natural wormwood contains thujone, a toxic compound that can cause hallucinations and seizures.
For this reason, wormwood products sold in the United States are required to be thujone-free.
U.S. Food and Drug Administration.Natural flavoring substances and natural adjuvants.
CFR - Code of Federal Regulations Title 21. extract on gastrointestinal hormones and brain-gut peptides in functional dyspepsia rats.Evid Based Complement Alternat Med.
2015;2015:1-8. doi:10.1155/2015/670504
Food and Drug Administration.Food additive status list.
Ackgoz SK, Ackgoz E.Gastrointestinal bleeding secondary to interaction of Artemisia absinthium with warfarin.Drug Metabol Drug Interact.
2013;28(3):187-189. doi:10.1515/dmdi-2013-0021