High in healthy fats, olive oil isn't the only olive-tree product that might enhance your heart health. Preliminary research suggests that olive leaf extract may also help fend off heart disease. In tests on animals, for instance, scientists have discovered that olive leaf extract may help lower blood pressure, protect against insulin resistance, and prevent atherosclerosis.
Olive leaf extract is rich in oleuropein, a substance found to offer antioxidant and anti-inflammatory benefits. For more help in boosting your antioxidant capacity and reducing inflammation (two factors that could help fight heart disease), look to natural substances like anthocyanins, resveratrol, blueberry extract, black tea, green tea, and grape seed extract. Read the full article: Olive Leaf Extract - What You Need to Know.

What an interesting article, it has given me motivation to look more into this.