Stomach (gastric) ulcers can be debilitating and significantly reduce quality of life. A preclinical study evaluated the benefits of a blend of tangerine and patchouli (2:1 ratio) essential oil for stomach ulcers. Ingestion of the oil blend significantly improved stomach mucosal injury, decreased serum gastrin (GAS) and pepsinogen C, and increased prostaglandin E2. Altogether, the research suggests that ingesting a blend of tangerine and patchouli oil can heal stomach ulcers and reduce their recurrence.