Stimulating, reviving, invigorating Clearing for the mind and head Thought to promote mental clarity and to revive a poor memory Species: Rosmarinus officinalis Origin: North Africa Extraction Process: Steam distilled Rosemary Organic essential oil is a good all rounder. A few drops in the bath are helpful after an illness as a pick-me-up and a tonic. Studies have shown that it may help memory, relieve mental fatigue and lethargy.