Rosemary is an amazing multi-purpose herb. Its leaves have been used in traditional medicine for centuries. Rosemary (here) has been known for improving memory. In ancient Greece, the students would often put rosemary sprigs in their hair when studying for exams. You can also find the reference to rosemary in Hamlet when Ophelia declares: ‘There’s rosemary, that’s for remembrance: pray, love, remember.’
Source: livingtraditionally.com by Anya V
Studies have found that rosemary contains carnosic acid, which fights off free radical damage to the brain. Rosemary contains natural acids that help in protecting the body`s cells and DNA from free radical damage. The compounds in rosemary herb are said to prevent the breakdown of acetylcholine, which is a chemical that induces the brain cells that are responsible for memory and reasoning to communicate with one another.