Mediterranean, DASH, and Plant-Based Diets Linked to Years of Longer Healthy Life

Full analysis

Dr. Philip Snider reviewed what large, long-running studies show about dietary patterns and longevity. The Mediterranean diet (emphasizing whole grains, green leafy vegetables, lean meats, and fish over processed foods), the DASH diet (Dietary Approaches to Stop Hypertension, developed to control blood pressure), and plant-based diets endorsed by the American College of Lifestyle Medicine have all been shown in large studies to add roughly one and a half to three years of life expectancy. Importantly, these gains were seen even in people with a genetic predisposition to shorter lives, and the benefit extends to healthspan — how many years you remain healthy and active past 70 — not just total lifespan. The diets have also been linked to better cognitive clarity and improved mood, including reduced depression and anxiety. Dr. Snider stressed that these need to be long-term dietary patterns, not short-term diets, and that ultra-processed foods — which he says food companies have engineered to be addictive since the late 1980s — drive up the inflammatory markers (C-reactive protein, interleukin-6, myeloperoxidase) that the five-test panel measures.