Why salt raises some People's blood pressure more than others

This study aims to understand why some people's blood pressure is more affected by salt in their diet than others, especially looking at differences between African American and Caucasian individuals. Healthy volunteers will follow a low-salt diet for one week and a high-salt diet for another week while researchers measure their body's responses. The goal is to learn how a specific gene might influence these reactions to help explain who is most at risk for salt-related high blood pressure.