Rosemary Leaf Extract is known for it's antioxidant support. Every 500mg of Rosemary Leaf Extract is Equivalent to 5000mg of Rosemary Leaf. Rosemary is an herb. It is native to the Mediterranean region but is now grown worldwide. The leaf and its oil are used to make medicine. Rosemary is used for improving memory indigestion (dyspepsia) arthritis-related joint pain hair loss and other conditions but there is no good scientific evidence to support most of these uses.