149 Virgin Olive Oil Benefits agement of overweight and obesity. While some health benefits may be attributed to olive oil itself, it is more likely that its synergistic interaction with other components of the Mediterranean diet contributes to its positive effects. EVOO, which is obtained directly from olives solely through mechanical processes, retains a high content of minor compounds such as polyphenols, which are believed to contribute to its health-promoting properties. 12.2. Epidemiological evidence on the association between olive oil consumption and overweight and/or obesity Epidemiological research exploring the relationship between olive oil consumption and overweight or obesity is largely based on indirect evidence and extrapolation. This is because olive oil is typically consumed as a key component of the broader Mediterranean dietary pattern rather than as an isolated food. Consequently, it is challenging to attribute observed health effects specifically to olive oil rather than to the overall dietary context. Nevertheless, numerous observational studies -including large-scale cohort studies like EPIC-PANACEA and multiple meta-analyses- have consistently shown that adherence to the Mediterranean diet is inversely associated with overweight and obesity prevalence. Given that extra virgin olive oil (EVOO) is the primary source of fat in this dietary pattern, it is reasonable to infer that it plays a role in these beneficial outcomes. More targeted evidence comes from studies such as the SUN (“Seguimiento Universidad de Navarra”) cohort in Spain. After a 4-year follow-up, participants who consumed more olive oil gained significantly less weight than those with lower consumption levels. Similarly, a longitudinal study conducted in Málaga (Spain) reported a lower incidence of obesity over a 6-year period among individuals who regularly consumed olive oil. However, these associations must be interpreted with caution. Most of the available data come from observational studies, which are inherently limited by confounding variables and cannot establish causality. Moreover, because olive oil is rarely consumed in isolation, its specific contribution to weight regulation remains difficult to isolate from the overall dietary pattern. To definitively assess the effects of olive oil independent of other dietary components, controlled intervention trials are necessary. These are discussed in the following section.
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