Olive is a tree. People use the oil from the fruit and seeds, water extracts of the fruit, and the leaves to make medicine.
Olive oil is used to prevent heart attack and stroke (cardiovascular disease), breast cancer, colorectal cancer, rheumatoid arthritis, and migraine headache.
Some people use olive oil to treat constipation, high cholesterol, high blood pressure, blood vessel problems associated with diabetes, and pain associated ear infections, arthritis, and gallbladder disease. Olive oil is also used to treat jaundice, intestinal gas, and meteorism (swelling of the abdomen due to gas).
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Pregnancy and breast-feeding: There is not enough reliable information about the safety of taking olive products if you are pregnant or breast-feeding. Do not use amounts greater than the amount commonly found in foods.
Diabetes: Olive oil might lower blood sugar. People with diabetes should check their blood sugar when using olive oil.
Surgery: Olive oil might affect blood sugar. Using olive oil might affect blood sugar control during and after surgery. Stop taking olive oil 2 weeks before surgery.
BY MOUTH: For constipation: 30 mL of olive oil. For high blood pressure: 30-40 grams per day of extra-virgin olive oil as part of the diet. 400 mg of olive leaf extract four times daily has also been used for high blood pressure. For high cholesterol: 23 grams of olive oil per day (about 2 tablespoons) providing 17.5 grams of mono unsaturated fatty acids in place of saturated fats in the diet. For preventing heart disease and heart attacks: 54 grams per day (about 4 tablespoons) has been used. As a part of a Mediterranean diet, consuming up to 1 liter of extra-virgin olive oil per week has also been used.