The article emphasizes the critical role of biodiversity in ensuring sustainable diets and nutrition security. It demonstrates that the Mediterranean diet, with its higher diversity in cultivated food plants, provides a model for sustainable eating patterns. The study highlights the need for integrated approaches in nutrition and agricultural policies to enhance biodiversity, mitigate climate change, and promote public health. Adopting sustainable diets such as the MD can lead to more resilient agro-food systems and healthier environments, benefiting both human and ecological well-being.