Eating just two teaspoons of salt a day damages the heart, new research suggests.
Having a sodium intake of 3.73 grams, the equivalent of around two teaspoons of salt, is associated with larger heart chambers, a study found.
Previous research suggests hearts become enlarged when the muscle is overworked due to an underlying condition, such as high blood pressure.
Such a salt intake also increases strain on the heart's muscle and boosts its beating rate, the research adds.
These results are thought to be due to salt's impact on blood pressure, which previous research reveals is linked to heart attacks, stroke and kidney disease.
The CDC and NHS both recommend adults eat no more than around one-and-a-quarter teaspoons of salt a day, which is easily exceeded if people eat ready-prepared food.