DASH stands for Dietary Approaches to Stop Hypertension. The DASH diet may help you lower blood pressure. It may also help keep you from getting high blood pressure. You will eat less fat and more fiber on the DASH diet. This diet gives you more minerals that fight high blood pressure. Some nutrients in this diet are: Potassium − Acts to help you get rid of salt. This may help to lower blood pressure. Calcium − Makes blood vessels and muscles work the right way Vitamin B12 − Helps the cells work the right way Fiber − Helps you feel full. It also helps digestion.