American Dill Weed oil has a fresh, warm, spicy aroma that is slightly different from the Indian origins. Naturally occurring substances are carvone, limonene, and dihydrocarvone with trace amounts of eugenol, anisic aldehyde, anethole and thymol. Don’t be scared off by the name, Dill Weed essential oil has a long history as a remedy for health challenges. The Ebers Papyrus, an Egyptian medical document from 1550 B.C. mentions Dill as an herb of medicinal value that aids in boosting immunities during times of seasonal illness.