Dodder plants (Cuscuta species) used in traditional medicine contain powerful antioxidant compounds that can help protect cells from damage. This study found that different dodder species have varying amounts of these beneficial compounds, and surprisingly, the type of host plant the dodder parasitizes directly affects how many antioxidants it produces. When dodders infect aromatic plants like thyme and rosemary, they accumulate more antioxidant compounds than when grown on other plants.