The principal foods that contain chloride are seaweed, rye, tomatoes, lettuce, celery and olives. The body uses chloride to stabilize body fluids. It's an essential part of the digestive system, according to MedlinePlus.. Table salt and sea salt are also good sources for chloride.
Chloride helps muscles relax and allows for easier nerve signal transmission. The general sodium intake limit from all sources is less than 2,300 mg a day, according to the Centers for Disease Control. Individuals over the age of 51 who have high blood pressure, diabetes or chronic kidney disease are encouraged to limit sodium consumption to 1,500 mg a day while consuming 4,700 mg of foods heavy in potassium, states the CDC.