Carrot seed oil is an essential oil, which is a combination of the aromatic compounds that naturally exist in plants. ecause of the compounds in carrot seed essential oil, it can help:â?? Remove fungus. Carrot seed oil is effective against some types of fungus. Research shows that it can stop fungus that grows in plants and some types that grow on the skin.â?? Fight bacteria. Carrot seed oil can fight some bacteria strains like Staphylococcus aureus, a common skin bacteria, and Listeria monocytogenes, a bacteria that causes food poisoning. Block sunlight. A compound called umbelliferone, or 7-hydroxycoumarin, is found in carrot seed essential oil. This compound absorbs UVB light and is commonly used in sunscreens.