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This week on the Olive Health Information System website
The newsletter of the University of Navarra and the IOC dedicated to health
Article 1
Growing evidence supports the Mediterranean diet as an effective nutritional strategy for preventing and managing metabolic disorders. Adherence to this dietary pattern has been consistently associated with a lower prevalence of metabolic syndrome and its key components, including central obesity, hypertriglyceridemia, low HDL cholesterol, hypertension, and hyperglycemia. The metabolic benefits of the Mediterranean diet are largely attributed to its distinctive nutritional profile: an emphasis on fiber-rich whole grains, legumes, fruits, and vegetables with a low glycemic load; regular consumption of fish and nuts, which provide polyunsaturated fatty acids; and olive oil as the primary source of cardioprotective monounsaturated fatty acids. Together, these elements promote improved metabolic regulation and reduced cardiometabolic risk.
This week, we highlight two recent studies examining the role of the Mediterranean diet in hepatic disease and obesity. The first, a cross-sectional analysis of National Health and Nutrition Examination Survey (NHANES) data collected between 2017 and March 2020, examined the association between Mediterranean diet adherence and liver fibrosis among adults with metabolic dysfunction-associated steatotic liver disease (MASLD). Greater adherence was significantly associated with a lower risk of liver fibrosis. Notably, individuals with the highest burden of metabolic risk factors showed a 42% lower risk of fibrosis compared with those with low adherence.
The second study is a meta-analysis evaluating the effectiveness of the Mediterranean diet, with or without concomitant physical activity, in the management of pediatric obesity. The analysis included 18 studies encompassing 1,539 participants aged 2 to 18 years. Interventions based on this dietary pattern were associated with significant improvements in body mass index and body fat percentage. Moreover, combined interventions incorporating both the Mediterranean diet and structured physical activity demonstrated greater effectiveness compared with dietary intervention alone, underscoring the value of integrated lifestyle strategies.
Overall, these findings once more confirm the protective potential of the Mediterranean diet against metabolic disease. In line with a robust and growing body of literature, higher adherence—particularly when paired with regular physical activity—emerges as an effective strategy for preventing and managing obesity in childhood and adolescence.
Article 2
Recent scientific findings continue to support the notion that extra virgin olive oil and the Mediterranean diet play a pivotal role in maintaining cardiovascular and brain health. A recent article provides a comprehensive review of the bioactive phenolic compounds present in extra virgin olive oil and their potential implications in the context of cardiovascular prevention. At the molecular level, these polyphenols modulate key pathways such as NF-κB, Nrf2, and PI3K/Akt, enhancing the bioavailability of endothelial nitric oxide while reducing oxidative stress and vascular inflammation —central mechanisms in atherogenesis.
Beyond cardiovascular health, adherence to the Mediterranean diet has also been linked to meaningful benefits in the mental health domain. A cross-sectional study of 2,697 Italian university students found that a one-point increase on the Medi-Lite scale —a validated 0–18 point score used to measure adherence to the Mediterranean diet— was associated with a 9% reduction in the likelihood of clinically relevant depressive symptoms. Higher consumption of plant-based foods appeared particularly protective: eating more than two servings of fruit per day or more than 2.5 servings of vegetables was associated with an approximately 38–40% reduction in depressive symptoms. Regular use of olive oil was likewise part of this protective dietary profile, even after adjusting for age and sex.
In the field of cognitive impairment, a case-control study including 30 patients with Alzheimer’s disease and 30 healthy controls examined the relationship between adherence to the MIND diet, malnutrition and depression. The MIND diet—short for Mediterranean-DASH Intervention for Neurodegenerative Delay—is a dietary pattern specifically designed to support brain health. It combines elements of the Mediterranean diet and the DASH diet, with particular emphasis on leafy green vegetables, berries, olive oil, whole grains, nuts, legumes, and fish. In this study, higher adherence to the MIND diet was significantly associated with lower depression scores and better nutritional status. The risk of Alzheimer’s disease was 2.03 times higher in individuals at high risk of malnutrition (95% CI: 1.14–3.62), while a higher MIND diet score was associated with a 2.88-fold greater probability of belonging to the healthy group (95% CI: 1.51–5.50).
Together, these studies reinforce the view of extra virgin olive oil and the Mediterranean diet – and its variants, such as the MIND diet – not only as heart-healthy dietary models, but also as potential tools for promoting mental and cognitive health.
Other articles mentioned this week in the OHIS newsletter:
Olive fruit and olive oil
Bioactive Phenolic Compounds in Extra Virgin Olive Oil: Implications for Cardiovascular Health.
Lab-on-a-fruit: an approach for chemical evaluation of olive oil composition prior to extraction.
Chemesthetic Perception in Extra Virgin Olive Oil and Olive Ripening Stage: A Sensory Perspective.
Metabolic disorders
Mental health
Mediterranean diet
Food for the Lungs: The Mediterranean Diet and Adult-Onset Asthma.
Others
Phenotype-Specific Mitochondrial Responses to Mediterranean Diet and Exercise in Elderly Obesity.
Loneliness, Aloneness, and Adherence to the Mediterranean Diet in Southern Italian Individuals.
