MODEL RELEASED. Sage oil extraction. Medical researcher using a pipette to obtain an oil that has been steam distilled from leaves from the sage plant. The sage oil is being investigated for its medicinal effects. Sage has been used by herbalists for centuries to improve memory, and a medical trial in 2003 showed improved short-term memory recall in those given sage oil tablets. It is thought that sage oil tablets could slow the onset of Alzheimer's disease. Sage species being investigated include Salvia lavandulaefolia and Salvia officinalis. This research is being carried out at laboratories at the Universities of Newcastle and Northumbria, UK, as part of work by the Medicinal Plant Research Centre.