Rosmarinus officinalis also commonly known as rosemary leaf extract is a favorite in cooking and personal care. Not only does it go well with chicken for a deep herbal flavor. Or does it go well with lavender for an extra soothing aroma. But it is rich in vitamins and nutrients including iron and calcium as well as antioxidants. Rosemary (Rosmarinus officinalis) has a multitiude of benefits ranging from supporting healthy collagen development to fighting off skin-damaging free radicals.