Rosemary (Rosmarinus officinalis L.) is native to the Mediterranean region. Rosemary belongs to the Lamiaceae family and possesses needle-like leaves which contain a powerful fragrance and polyphenolic compounds: phenolic acids such as rosmarinic acid (RA) and caffeic acid; phenolic diterpenes such as carnosic acid (CA), carnosol and triterpenoids such as ursolic acid (UA) ( Fig. 1). This polyphenol profile induces antioxidant [3], [4] and [5], antibacterial [5] and [6] and antimutagenic properties to rosemary extracts. RA and CA are more specifically used in the food industry as natural antioxidants [7] and [8]. Apart from the antioxidant properties of rosemary compounds, UA is another valuable natural compound which is studied for its pharmacological effects (e.g., antitumor property [9]).