The Northern Ireland Chest, Heart and Stroke Association is accusing food producers of contributing to thousands of deaths a year by failing to cut salt in processed food.
The charity says that although many people are aware that salt affects their health, the quantity of salt in packaged food is often hidden by complicated terminology.
"A bowl of cornflakes has the same salt concentration as seawater," said Andrew Dougal, chief executive at the charity. "But the average person has no way of telling simply by looking at the food label."
The association has teamed up with medical pressure group Consensus Action on Salt and Health to lobby the Government and food manufacturers to introduce clear labelling and reduce the amount of salt they add to their products.