Orris root comes from the roots of certain Iris species. People once used it in traditional preparations, but today it mainly serves as a flavoring fixative in potpourri and perfumes, not as a systemic supplement.
Very little modern science backs any internal health benefit. A few traditional herbal systems employed it for respiratory or digestive support, but clinical research has not confirmed those effects.
If you take it internally, you will typically use very small amounts, often as a glycerite or extract. Safety concerns mean internal use is not generally recommended.
Orris root can cause gastrointestinal irritation, nausea, and vomiting. It also contains compounds that can act as a mild laxative. Do not use it if you are pregnant or breastfeeding, or if you have any kidney or digestive condition. The raw root can irritate the skin.