Lomatium dissectum root comes from a plant native to western North America. People use it mainly to support immune function, especially when seasonal respiratory challenges arise.
Lomatium has a strong, bitter taste. Most people take it as a tincture or liquid extract, diluting it in water or juice to make it easier to swallow. They often take it at the first sign of a cold or flu.
Lomatium can cause a widespread, itchy rash in some people. The risk is higher with high doses or for those sensitive to plants in the Apiaceae (carrot) family. Start with a small amount to check your tolerance.