In ancient Greece and Rome, rosemary was thought to strengthen memory .Research indicates that inhaling rosemary oil helps prevent the breakdown of acetylcholine, a brain chemical important for thinking, concentration and memory.One of the most common types of hair loss is androgenetic alopecia, better known as male pattern baldness, though it can also affect females.Rosemary oil treats androgenetic alopecia by preventing a byproduct of testosterone from attacking your hair follicles, which is the cause of this condition. Rosemary oil increase circulation. If you experience cold fingers and toes — even in relatively warm temperatures — rosemary oil is worth considering. Inhaling rosemary effects may relieve stress and axniety. It is great in reducing joint inflammation.