Tailored Messaging to Reduce Sodium Intake

People with high blood pressure often get advice to lower their salt or sodium intake. High dietary sodium intake is linked to high blood pressure, stroke, heart failure and kidney disease. U.S. federal guidelines advocate daily sodium intake of less than 2,300 milligrams (mg). The estimated average sodium intake for Americans is 3,400 mg per day. In recent years, consumption of processed and restaurant foods has substantially increased. More than 75% of sodium in the average U.S. diet now comes from these sources. The mobile application will deliver tailored messages based on the user's location and previously identified high-sodium food items that they commonly consume. This 8-week research study at Visit 1 or baseline will consent and randomize 50 eligible adults with high blood pressure to use the mobile application daily or to follow their usual eating pattern with no access to the application. All participants will be asked to complete four surveys at baseline and Week 8: Block Food Frequency Questionnaire, Block Sodium Screener, Self-care Confidence in following a Low Sodium Diet and the Automated Self-administered 24-Hour Dietary Recall survey. All participants will be asked to provide a baseline and end of study 24-hour urine collection, regularly provide home blood pressure measurements and urine dipstick tests every two weeks.