Salt sensitivity refers to the variability of blood pressure response to changes in dietary salt intake. Some individuals are considered salt-sensitive, meaning their blood pressure is significantly affected by salt consumption, while others are salt-resistant and their blood pressure remains relatively stable regardless of salt intake. Researchers study salt sensitivity to better understand the underlying mechanisms and factors that contribute to hypertension and cardiovascular disease. This research often focuses on genetic factors, kidney function, hormone regulation, and how salt interacts with the body's blood pressure regulation systems. Identifying individuals who are salt-sensitive can help in developing personalized dietary recommendations and treatment strategies for hypertension. Understanding salt sensitivity can also inform public health policies and interventions aimed at reducing salt intake in the population to improve cardiovascular health.