The individual who should most likely follow a low-sodium diet is a teenager with heart failure.
Heart failure often leads to fluid retention, and a low-sodium diet can help manage this condition by reducing the amount of fluid the body retains. Therefore, it is crucial for individuals with heart failure to monitor and limit their sodium intake.
While the other individuals mentioned may have specific dietary needs, they do not indicate conditions that would typically require a low-sodium diet to the same extent as heart failure.