The Science of Rosemary Rosemary (Rosmarinus officinalis) contains active compounds like carnosic acid, rosmarinic acid, and powerful antioxidants. Together, these protect the brain, boost circulation, and fight inflammation. Research shows rosemary may: Enhance memory and focus by stimulating brain activity. Support digestion by reducing bloating and discomfort. Improve circulation and heart health through its antioxidant effects