Scientifically speaking, they are right to recommend that students breathe in rosemary essence while trying to solve problems or face an exam. Researchers from Northumbria University (United Kingdom) have shown that a high concentration in the blood of one of the components of this plant, 1,8-cineole, improves cognitive performance, specifically the speed and precision of responses.
In addition, this component, which is absorbed through the nasal mucosa and the lungs, crosses the blood-brain barrier and everything indicates that it inhibits the enzyme acetylcholinesterase and prevents the breakdown of the neurotransmitter acetylcholine, widely distributed in the human brain and necessary for learn, memorize and focus
