Dietary Patterns for Health-Span and Longevity: A Comprehensive Review of Nutritional Strategies Promoting Lifelong Wellness

Background: The pursuit of longevity has long been central to nutritional science, with growing evidence underscoring the profound influence of dietary patterns on lifespan and overall health. While various diets have been associated with improved well-being, their comparative effects on longevity remain to be synthesized comprehensively. Main Findings: This review examines the scientific evidence linking major dietary patterns such as the Mediterranean, DASH (Dietary Approaches to Stop Hypertension), plant-based, Blue Zones, intermittent fasting, caloric restriction, and Nordic diets, to longevity and mortality outcomes. The Mediterranean and DASH diets consistently demonstrate reduced cardiovascular and all-cause mortality, while plant-based and Blue Zones diets emphasize whole, minimally processed foods that enhance metabolic and cardiovascular health. Intermittent fasting and caloric restriction emerge as metabolic modulators with anti-aging potential. The Nordic diet, rich in locally sourced foods like berries and fish, also contributes to lower mortality and improved cardiovascular function. Conclusions: This paper uniquely integrates comparative insights from diverse dietary frameworks, emphasizing their shared principles of nutrient density, moderation, and metabolic balance. By adopting evidence-based elements from these dietary models, individuals can optimize health span and longevity, reinforcing the pivotal role of diet as a cornerstone of preventive and personalized nutrition.