Some people's blood pressure goes up a lot with salt, while others don't, depending on their kidneys, blood vessels, and genes.

“Salt sensitivity exists on a spectrum. Some people, particularly those with impaired kidney function, reduced nitric oxide production, or certain genetic variants, experience dramatic blood pressure rises from sodium intake. Others can consume high amounts of salt and show almost no pressure response because their kidneys and their vessels are still flexible enough to handle the volume shifts.”