Mediterranean Diet

Abstract

The term Mediterranean diet refers to the traditional eating patterns of people living in countries bordering the Mediterranean Sea, including Greece, Italy, southern France, Crete, Spain, and parts of the Middle East. The diet is primarily a plant-based eating pattern that emphasizes fruits, vegetables, whole grains, legumes, nuts, and seeds, with olive oil as the primary source of fat. Rich in minimally processed plant foods and monounsaturated and unsaturated fats from olives, nuts, and seeds, but low in saturated fats, the diet is relatively high in total fat, with at least 35% of calories from fat. The Mediterranean Diet includes moderate amounts of fish, poultry, and fermented dairy products, while red and processed meats are consumed in minimal quantities. Moderate wine drinking with meals has traditionally been an optional part of the diet. First recognized in the post–World War II era and later defined through the Seven Countries Study, the Mediterranean eating pattern has been linked to lower rates of cardiovascular disease and increased lifespan, sparking decades of research into its health benefits. Post–World War II research, beginning with Leland Allbaugh's Rockefeller Foundation–funded survey of Crete, described a local diet rich in olives, olive oil, whole grains, pulses, fruits, vegetables, and herbs, with low consumption of animal products. The Seven Countries Study, launched in 1958 by American physiologist Ancel Keys, later compared dietary patterns and health outcomes across 7 countries and found that populations in Italy and Greece, which primarily consumed olive oil as their main fat, had lower rates of all-cause and coronary heart disease mortality than those in northern Europe and the United States, providing evidence for the health benefits of the Mediterranean diet. Historically, the Mediterranean diet was deeply rooted in local agriculture, climate, and cultural traditions, with meals centered on seasonal, minimally processed plant foods and communal eating as a key part of daily life. This sociocultural and economic context is increasingly uncommon in the twenty-first century, as modernization and globalization have shifted toward processed foods, including those with added sugars, refined grains, and industrial or animal fats, accompanied by a decline in home cooking and the sharing of meals. The "contemporary" Mediterranean diet, often discussed in clinical research and popular publications, reflects an adaptation of the traditional lifestyle rather than a direct continuation. The diet emphasizes similar core food groups but is implemented within modern food systems, diverse cultures, and different socioeconomic settings, factors that can influence adherence, nutrient quality, and overall health effects. This activity examines key issues related to the Mediterranean diet, including evidence for health benefits, contemporary application of the diet, and the limitations of existing scientific research. Also reviewed are the consensus recommendations from leading professional organizations and highlights practical strategies for interprofessional teams to incorporate the diet into patient education and chronic disease management. The article aims to equip clinicians with the tools needed to counsel patients on adopting this dietary pattern in practice by addressing both the scientific basis and real-world applications.