The olive leaf is a staple of the Mediterranean diet, which scientists study for its potential to prevent chronic diseases. Research points to lower rates of illnesses and cancer-related deaths among populations that follow this diet.

Olive leaf extract is a concentrated dose of the nutrients in olive tree leaves. It’s a potent source of antioxidants that support your immune system. By fighting cell damage that causes disease, antioxidants work to reduce your risk of many illnesses.

The antioxidants in olive leaf extract are mainly polyphenols. Scientists believe these plant-based nutrients play a role in preventing conditions like cognitive decline, cancer, and osteoporosis.