The olive leaf was first used medicinally in Ancient Egypt, and it was a symbol of heavenly power. It is the leaf of the olive tree, called Olea europaea. Olive leaves have been used in the human diet as an extract, an herbal tea and a powder. They contain many potentially bioactive compounds that have antioxidant, antihypertensive, antiatherogenic, anti-inflammatory, hypocholesterolemic and hypoglycemic properties — similar to olive oil benefits.
1. Lowers Blood Pressure
A 2011 study evaluated the effectiveness of olive leaf extract in comparison to Captopril, a medication that is given to patients with hypertension or high blood pressure. Five hundred milligrams of olive leaf extract, taken twice daily for eight weeks, significantly reduced systolic and diastolic blood pressure.
While both olive leaf extracts and Captopril were able to prevent high blood pressure levels, the olive leaf treatment also resulted in a reduction of triglyceride levels (reducing bad cholesterol); plus, there are a number of possible side effects when taking Captopril, including dizziness, loss of taste and dry cough.
2. Improves Cardiovascular Health
Olive leaves have been used as an herbal tonic to support cardiovascular function for thousands of years. High doses of olive leaf extract have been shown to help reduce elevated LDL-cholesterol levels and assist in the maintenance of normal blood pressure. Oleuropein, the main glycoside present in olive leaf, and hydroxytyrosol, the principal product of oleuropein that is present in olives and olive leafs, have both been linked to reduction of coronary heart disease and certain cancers.
A study done at the School of Biomedical Sciences in Australia examined rats that were fed a high fat and high carbohydrate diet for 16 weeks. The rats that were not treated developed signs of elevated abdominal and hepatic fat deposition, collagen deposition in heart and liver, cardiac stiffness and oxidative stress markers. The rats that were treated with olive leaf extracts had improved or normalized cardiovascular, hepatic (liver function) and metabolic signs. This study suggests that olive leaf extracts reverse cardiovascular stress and chronic, disease-causing inflammation.
One study conducted in Greece measured the effects of olive leaf extracts on the formation of advanced glycation end products (known as AGEs), which are substances that can be a factor in the development of diabetes and many other chronic diseases. Inhibiting AGE formation is a preventive and therapeutic target for patients with diabetes, and a 2013 study found that olive leaf extract did just that, working as a diabetes natural treatment.
Olive leaf extracts have hyperglycemic effects, meaning they reduce blood sugar levels in the body. The olive leaf also controls blood glucose levels in the body. The polyphenols in the olive leaf plays a vital role in delaying the production of sugar, which causes inflammatory diseases like diabetes. One study proved this when olive leaves suppressed the elevation of blood glucose in volunteers after they were consumed starch.
4. Reduces the Risk of Cancer
Olive leaves show an important role as a natural cancer treatmentbecause of its ability to stop the angiogenic process, which stimulates the growth of tumors. The compound oleuropein has an antioxidant and anti-angiogenic effect by inhibiting the reproduction and migration of advanced tumor cells.
A 2009 study conducted in Greece showed, for the first time, that olive leaf extracts have strong antioxidant potency and inhibit cancer and endothelial cell reproduction. Olive leaf extracts slowed the growth of cells associated with breast cancer, urinary bladder cancer and brain cancer.
5. Improves Brain Function
Another olive leaf benefit is its positive effects on brain function. Studies show that oleuropein, one of the main components in olive leaf, reduces the symptoms or occurrence of age-related disorders, such as dementia and Alzheimer’s disease.
Research suggests that there is a connection between free radicals and Alzheimer’s — because olive leaf is an antioxidant, it helps to combat the damage caused by free radicals and protects the brain from memory loss. Using olive leaf infusions or extracts is a safe and effective way to treat Alzheimer’s disease naturally.
6. Treats Arthritis
Arthritis is a joint disease that causes swelling and pain in the joints; the key word here is swelling — which means inflammation. Because the olive leaf is an anti-inflammatory agent, it works as a natural arthritis remedy.
A 2012 study found that olive leaf extracts significantly reduced paw swelling in rats with arthritis; this is because the extracts were able to reduce the inflammation that was present in the joints. Osteoarthritis is the most common type of arthritis, impacting more than 33 million American adults. This occurs when the cartilage between the bones and the joint wears down, which allows the bones to rub together rather than giving them the protection and cushion of cartilage.
Studies have shown that olive leaf extracts cuts down on the chronic pain that is associated with osteoarthritis, and it reduces the production of cytokines and enzymes that are markers for the inflammatory process.
7. Kills Bacteria and Fungi
An important olive leaf benefit is its ability to fight off infections, including candida infections, meningitis, pneumonia, chronic fatigue, hepatitis B, malaria, gonorrhea, shingles and tuberculosis; it also naturally treat ear infections, dental and urinary tract infections.
A study done in 2003 proved that olive leave extracts have an antimicrobial effect against bacteria and fungi. In the study, the olive leaf extracts killed almost all bacteria tested, including