Pennington Biomedical Research Center is spotlighting the Dietary Approaches to Stop Hypertension (DASH) diet after The 2025 U.S. News & World Report rated it as the best heart-healthy diet and second best overall.Developed in the 1990s, the DASH diet may help fight high blood pressure and is backed by science and research for its health benefits. It claims to be nutritionally complete, versatile, filling and non-restrictive.