Petitgrain Oil Petitgrain Essential Oil is derived from the leaves and twigs of the bitter orange tree, which has a long history of use in traditional health practices. Two other essential oils come from the same tree: Neroli from the blossoms and Bitter Orange from the fruit rinds. Petitgrain oil is widely used in the perfume industry, giving body sprays, lotions, and colognes a fresh and herbaceous note that?s popular among both women and men. Historically, petitgrain oil was used as a topical cleanser. People also consumed it to support healthy immune and nervous system function.* Emerging scientific evidence supports these and other uses. By sourcing Petitgrain essential oil from Paraguay through Co-Impact Sourcing, doTERRA supports needed rural community development projects and provides diversified income for small-scale farmers. Growing bitter orange trees allows farmers to earn income without clearcutting land for crops, protecting the remaining patches of the Atlantic Forest in eastern Paraguay.