Monthly Archives: January 2014

Olive Oil and Cancer

Epidemiological studies suggest that olive oil exerts a protective effect against certain malignant tumours (breast, prostate, endometrium, digestive tract, …).
A number of research studies have documented that olive oil reduces the risk of breast cancer. Eating a healthy diet with olive oil as the main source of fat could considerably lower cancer incidence. The reason is that the cell mutations caused by cancer are partly due to toxins which, when consumed through the diet, attack DNA. On passing through the liver, these toxins produce free radicals that then attack DNA. To combat such free radicals, the body needs vitamins and antioxidants like those contained in olive oil.
It has also been reported that an olive-oil-rich diet is associated with reduced risk of bowel cancer. The protective effect of olive oil is irrespective of the amount of fruit and vegetables eaten in the diet.
Recent studies have demonstrated that olive oil provides protection against cancer of the colon. Lately, research has been looking into the metabolic implications of fats, more specifically the protective role of olive oil in chronic liver disease and in the disorder of the intestines known as Crohn’s disease. Results point to beneficial effects of olive oil on pre-cancerous lesions. After analysing three types of diet, research scientists arrived at various conclusions. The olive oil diet reduced the number of cancerous lesions; the number of tumours that developed was clearly and significantly low; and the tumours were less aggressive and had a better prognosis.
This beneficial effect could be related to oleic acid, the predominant monounsaturated fatty acid in olive oil. It has been observed that this fatty acid lowers the production of prostaglandins derived from arachidonic acid, which in turn plays a significant part in the production and development of tumours.
However, it is not excluded that other constituents of olive oil, such as antioxidants, flavonoids, polyphenols and squalene may also have a positive influence. Squalene is believed to have a favourable effect on the skin by reducing the incidence of melanomas.
Olive oil also adds to the taste of vegetables and pulses whose benefits in cancer prevention have been amply proved.
Some very promising, current research is centred on the protection provided by olive oil against child leukaemia and various cancers, such as oesophageal squamous cell cancer.
Much has still to be discovered about how olive oil affects cancer and concrete data are still lacking on the mechanisms behind the beneficial role it plays in the prevention or inhibitionof the growth of different types of cancer. However, according to the information available at present, olive oil could actsimultaneously during the different stages involved in the process of cancer formation.

Mediterranean Diet with Extra Virgin Olive Oil May Protect from Diabetes

In the latest trial of the ongoing intervention study PREDIMED, Spanish researchers found that following a Mediterranean diet may cut the risk of diabetes by about 30 percnt compared to the control diet, which was characterized as a low fat diet.

The study published in the Annals of Internal Medicine, involved 3,541 men and women who were a subgroup of the larger PREDIMED study that enrolled over 7,000 participants from seven communities in Spain since 2003. The men and women for this particular trial were between 55 and 80 years of age and at high risk for heart disease, but without diabetes.

As is standard with the PREDIMED study, the participants were assigned to one of three diets: Mediterranean diet supplemented with extra-virgin olive oil, Mediterranean diet supplemented with nuts, or a control diet (participants were advised to follow a low fat diet). The participants were not asked to exercise or lose weight.

At follow up which was on average 4.1 years, 101 individuals from the control group developed diabetes, while only 80 individuals from the olive oil Mediterranean diet group developed the disease. The researchers noted that adherence was much higher in the Mediterranean diet groups and concluded that a Mediterranean diet enriched with extra virgin olive oil without caloric limitations may reduce diabetes risk in individuals with a high heart disease risk.

This is not the first time that the Mediterranean diet has been found to have a preventative effect against diabetes. In 2011 a smaller trial (418 participants) of the PREDIMED study showed that a Mediterranean diet reduced the risk of type II diabetes by almost 50 percent compared to a low fat diet.

By ELENA PARAVANTES on January 8, 2014