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Mediterranean diet benefits only the Rich, New Study

Only the upper-class people with higher incomes or more education, or a combination of the two actually benefit from the Mediterranean diet, Italian study says


The surprising finding of a latest Italian study shows that The Mediterranean diet doesn’t benefit everyone.

Although the diet includes healthy food such vegetables, fruits, nuts, whole grains, fish and poultry which past scientific research proves to be heart-healthy – such benefits are strongly influenced by the socioeconomic position of people. It works only if you are rich or highly educated or both.

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To complete the picture the Mediterranean diet also recommends that you limit red meat, replace butter with olive oil, and keep on exercise. A glass of red wine once a day Red wine in moderation is optional on the diet, which past scientific research proves to be heart-healthy.

The team of researchers led by Giovanni de Gaetano, at the Department of Epidemiology and Prevention, recruited over 18,000 people living in the Molise region of southern Italy between March 2005 and April 2010.

Basically, given a comparable devotion to this form of eating, the study has shown that the lowering of cardiovascular risk is noticed only in people with higher educational level and/or greater household income. No actual benefits were found for the less advantaged groups.



“The cardiovascular benefits associated with the Mediterranean diet in a general population are well known — says Marialaura Bonaccio, researcher at the Department of Epidemiology and Prevention and first author of the study — Yet for the first time our study has revealed that the socioeconomic position is able to modulate the health advantages linked to Mediterranean diet. In other words, a person from low socioeconomic status who struggles to follow a Mediterranean model, is unlikely to get the same advantages of a person with higher income, despite the fact that they both similarly adhere to the same healthy diet”.

Neuromed researchers went further and tried to figure out the possible mechanisms underlying such disparities.

“Given a comparable adherence to the Mediterranean diet, the most advantaged groups were more likely to report a larger number of indices of high quality diet as opposed to people with low socioeconomic status — explains Licia Iacoviello, head of the Laboratory of nutritional and molecular Epidemiology at the Department — For example, within those reporting an optimal adherence to the Mediterranean diet (as measured by a score comprising fruits and nuts, vegetables, legumes, cereals, fish, fats, meat, dairy products and alcohol intake) people with high income or higher educational level consumed products richer in antioxidants and polyphenols, and had a greater diversity in fruit and vegetables choice. We have also found a socioeconomic gradient in the consumption of whole-grain products and in the preferred cooking methods. These substantial differences in consuming products belonging to Mediterranean diet lead us to think that quality of foods may be as important for health as quantity and frequency of intake”.


“Our results should promote a serious consideration of socioeconomic scenario of health – comments Giovanni de Gaetano, “Socioeconomic disparities in health are growing also in access to healthy diets. During the very last years, we documented a rapid shifting from the Mediterranean diet in the whole population, but it might also be that the weakest citizens tend to buy ‘Mediterranean’ food with lower nutritional value. We cannot be keeping on say that the Mediterranean diet is good for health — de Gaetano concludes — if we are not able to guarantee an equal access to it”.

“For example, as compared to less advantaged counterparts, people with high socioeconomic status tended to consume fish more frequently,” Bonaccio wrote. She added that, beyond diet adherence, participants in the most advantaged category reported a higher quality diet, which included higher consumption of organic products and whole grain foods.

Marialaura Bonaccio, researcher at the Department of Epidemiology and Prevention and first author of the study said: “Let’s give that two persons follow the same diet, that is equal amounts of vegetables, fruits, fish, olive oil etc. every day so that they report the same adherence score to Mediterranean diet,” Bonaccio said. “It might be that, beyond quantity, differences in quality may exist. For example, in olive oil.”

A bottle of olive oil with a price tag of $2 has not the same nutritional properties as extra virgin olive oil costing $10. Given that it is logical to assume rich people are more likely to buy the nutrient expensive bottle compared with lower-income, “our hypothesis is that differences in the price may yield differences in healthy components and future health outcomes,” Bonaccio said.

This finding by researchers from the Italian I.R.C.C.S. Neuromed, an Italian Clinical Research Institute, published in the International Journal of Epidemiology.




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