The olive tree produces a powerful healing substance known as Oleuropein, a phenolic compound, chemically proven to have disease resistant properties. Since ancient times the extract from olive trees was used against viruses, Flu, fungi, parasites & bacterial infections. It is still used & recognized today by agriculturists, herbalists & holistic doctors as a totally effective & completely safe all-natural healer. To learn more about the enormous therapeutic benefits of Olive Leaf Extract it is highly recommended you read the book Olive leaf Extract by Dr. Morton Walker. Oleuropein (standardized 20%) 100 mg* Olive Leaf Extract 500 mg * * Daily value not established Other Ingredients: Plant Gelatin