Historical use of the olive tree since the mid-19th century suggests potential benefits in lowering fevers (particularly in reducing the symptoms of malaria). Studies show another key active vauqueline does indeed exert fever-lowering effects.
Scientific investigation of oleuropein points to a potential blood pressure-lowering action, an increase in blood flow through the coronary vessels and an anti-arrhythmic capability. Although clinical trials are currently lacking with respect to olive leaf’s cardiovascular attributes, the research that has been published suggests that it does show great promise as a general cardiovascular tonic.