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9 Proven Olive Leaf 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 treatment because 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 dermatophytes (causing infections on the skin, hair and nails), candida albicans (an agent of oral and genital infections) and Escherichia coli cells (bacteria found in the lower intestine).
8. Improves Immune System
The olive leaf has antiviral properties, giving it the ability to prevent the common cold as well as treat dangerous viruses. Research shows that olive leaf extracts effectively fight against a number of disease-causing microbes, including some of viruses that cause influenza and other respiratory infections.
The powerful compounds found in olive leaves destroy invading organisms and don’t allow viruses to replicate and cause an infection. In fact, the olive leaf is so beneficial to our health that treatment with olive leaf extracts reversed many HIV-1 infection-associated changes in a study done at the New York University School of Medicine.
9. Protects Skin
Olive leaf has the power to reverse years of damage to your skin and the signs of aging. Because of the olive leaf’s antioxidant properties, it helps to prevent certain types of cell damage, especially those caused by oxidation. Foods and herbs that contain antioxidants are great tools for the health of your skin and cells.
The Division of Biochemical Pharmacology in Japan found that olive leaf extract, when given to mice with UV radiation damage, decreased skin thickness and skin elasticity, which are signs of skin damage. The treatment also inhibited skin carcinogenesis and tumor growth.
Some more olive leaf benefits may include:
diminished food cravings
joint pain relief
improved wound healing
History & Interesting Facts
Several studies have shown that coronary heart disease and cancer rates are the lowest in the Mediterranean area because their diets are rich in olives and olive products.
A 2015 clinical trial published in JAMA Internal Medicine found that the Mediterranean diet, which is high in antioxidant-rich foods, herbs and oils, improves cognitive function. Because oxidative stress and vascular impairment lead to age-related cognitive decline, which is a strong risk factor for the development of dementia, the use of antioxidants in your daily diet makes a major difference.
Of the 334 people who participated in the study, it was the group who followed the Mediterranean diet (consisting of less red meat and more fruits, veggies and whole grains) and took an olive oil supplement (one liter a week) that showed the most improvement after five years.