Speakers and audience in a semi-darkened auditorium at the Oleocanthal International Society conference in Ancient Olympia, Greece

This June in Ancient Olympia, Greece, the Oleocanthal International Society (OIS) held its third conference to discuss research on the health benefits of oleocanthal and other phenols in extra virgin olive oil, a key component of the Mediterranean diet. It attracted over 400 participants, including an unusual mix of scientists and olive oil producers.

Dr. Prokopios Magiatis, vice-president of the OIS, noted that scientists generally meet at conferences to discuss their research in a language that is not understood by olive oil producers, while “the producers do not have the opportunity to discuss [things] with scientists. This is what the OIS conference tried to change. The scientists tried to make their presentations understandable by the producers, and the producers had the opportunity to learn new things about the value of their product and how it can be increased.”

At the same time, Magiatis added, “the scientists had the opportunity to hear the problems that the producers face and to direct their future research appropriately.” Spyros Dafnis, producer of The Governor Extra Virgin Olive Oil, which won the award for the highest oleocanthal olive oil out of 565 samples at the Olympia Health & Nutrition Awards, reported that the OIS conference was dominated by “the olive-health relationship,” as well as offering “a great opportunity to link production with scientific research” about extra healthy olive oil.

At the OIS conference at the International Olympic Academy, Greek olive oil producers decided to arrange their own collaboration: an association of high phenolics olive oil producers to promote this new category of especially healthy olive oils. Eftychios Androulakis, producer of Pamako Premium Extra Virgin Olive Oil, came up with the idea for this association, which he presented at the OIS conference producers’ meeting, quickly attracting the interest of over 180 producers.
 
As Magiatis explained, the phenolic compound oleocanthal has been associated with “prevention of Alzheimer’s disease, inflammation and even cancer prevention.” Most of these claims have been “based on studies in animals or cells and need further confirmation in humans. The only study in humans is related to inhibition of platelet aggregation (meaning potential protection from infarction and strokes) and was presented during this conference.”

Magiatis was involved with that “first human study of high oleocanthal olive oil in platelet aggregation,” a collaboration between the USDA, the University of California at Davis, and the University of Athens. The conclusion: “Consumption of two tablespoons of olive oil high in oleocanthal has an impact on platelet aggregation comparable to ibuprofen at least in half of the volunteers. The same effect was not observed after consumption of olive oil generally rich in phenolics (e.g free tyrosol but not oleocanthal). Specific health protecting properties of olive oil are related to specific ingredients and are not generally observed for all types of olive oil. The results need verification in a larger population, but there is already a very strong indication.”
 
A number of other research findings based on work underway at the University of Athens were presented for the first time at the OIS conference. For example, Annia Tsolakou showed that an average of 55% of oleocanthal can be preserved under normal storage conditions 12 months after bottling and 18 months after harvesting.

Panagiotis Diamantakos presented evidence that low temperatures during malaxation (less than 25 degrees Celsius) and a short malaxation time (less than 30 minutes) during Olive Oil Production are not conducive to high phenolic content.

Iliana Kalaboki compared the NMR, Aristoleo, and Folin methods for the measurement of oleocanthal and related phenolics in olive oil, explaining evidence that Aristoleo can predict the oleocanthal and oleacein content with >90% accuracy compared with NMR, while Folin gave inconsistent results, making it an inappropriate method for estimating oleocanthal and oleacein content. 

Dr. Eleni Melliou revealed that a new variety of olive tree had been found around Olympia and proposed that it be named after that ancient city. With many neglected trees more than 1500 years old, this variety, according to Magiatis, “was found to produce an oil with an average content of total phenolics 3 to 5 times higher than the average of what we find in the international market” (based on an analysis of 100 different brands in US supermarkets). Perhaps the glory of Ancient Olympia is not completely lost in the past.

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Thanks to the OIS and 2ManStyles for the photos from the conference.

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