Doctors say too much salt in someone's diet, a key ingredient often in used in popular foods, can send sodium intake off the charts.

People in the U.S. typically consume about 50% more sodium than dietary guidelines recommend, The American Heart Association says.

Snack foods are the main culprits.

A new study in the Journal JAMA Network Open show popular snack foods heavily advertised throughout games such as the Super Bowl can contribute to heart health risks - pizza and chips for example, as well as fast food and prepared foods purchased at the grocery store.

Researchers analyzed the foods most advertised during the game to find their median sodium content was just over 900 milligrams - more than a third of the 2,300 milligrams average limit per-person.

Doctors with the American Heart Association say excess sodium in your bloodstream can be dangerous over time because it pulls water into your blood vessels, increasing your blood volume and therefore your blood pressure.