现代人对地中海饮食的认知往往强调橄榄油、蔬菜和鱼类的重要性，但历史文献揭示了一个截然不同的真相。[1]古罗马医生盖伦（129-216 CE）在其《食物特性论》中首次系统记录了古代地中海饮食的真实面貌，指出小麦是"最有价值"的食物，面包成为大多数人餐食的主要部分。[1]根据盖伦的记载，最好的面包应"充分发酵、揉搓充分"且以"适度热"烘烤。[1]他还记录了一次经历，食用未经加工的谷粒导致消化不良、胀气、头痛和视物模糊，说明谷物需经研磨、筛选、揉搓、发酵和烘烤才能营养丰富。[1]
古代地中海人的饮食还包括豆类、油、葡萄酒和时令蔬果等辅助食材。[1]豆类（扁豆、鹰嘴豆、羽扇豆）比现代人意识到的更为重要，提供大量营养。[1]虽然古代人确实食用水果和蔬菜（如生菜、卷心菜、葡萄等），但许多植物主要因药用效果而受重视，而非营养价值。[1]新鲜鱼类并非日常主食，其获取取决于地点和财富状况，鱼类可能昂贵且受污染。[1]作家阿瑟纳埃乌斯（约200 CE）的著作表明，所谓的"地中海饮食"因地区和财富差异巨大，某些地方海产丰富便宜，而另有地方鱼类极其昂贵。[1]
The popular modern conception of Mediterranean cuisine bears little resemblance to what people in the ancient Mediterranean actually ate, according to historical dietary records [1]. Rather than relying on olive oil, vegetables, and fish as contemporary versions emphasize, ancient Mediterranean populations derived most of their caloric intake from bread and grains [1].
Galen, a Roman physician who lived from 129 to 216 CE, provided the first systematic documentation of ancient Mediterranean diet in his work On the Properties of Foodstuffs, describing wheat as "the most valuable" food [1]. Bread constituted the primary component of most people's meals, with Galen noting that the best bread should be "thoroughly leavened, well-kneaded" and baked with "moderate heat" [1]. He recorded an experience in which consuming unprocessed grain kernels caused digestive distress, bloating, headaches, and blurred vision, demonstrating that grains required grinding, sifting, kneading, fermentation, and baking to become properly nutritious [1].
While ancient people did consume fruits and vegetables—including lettuce, cabbage, and grapes—many plants were valued primarily for their medicinal rather than nutritional properties [1]. Legumes such as lentils, chickpeas, and lupines played a more significant role in the diet than modern assumptions suggest, providing substantial nutrition [1]. Fresh fish was not a daily staple and its availability depended heavily on geography and wealth, with fish potentially expensive and contaminated in many areas [1]. Writing around 200 CE, the author Athenaeus documented vast regional and socioeconomic variations in Mediterranean diets, noting that while some locations enjoyed abundant and affordable seafood, other places experienced extremely high fish prices [1].
