But by Jan. 1, 1998, lower sodium levels would be required.

Blood tests can show if you have high potassium or low sodium levels.

But as the tomato becomes more processed, the sodium levels change.

Three more were dead the next day, with four others in critical condition, and all had abnormally high sodium levels.

They found that 13% of the runners had low sodium levels.

Excessive sodium levels would show up in an autopsy, he said.

The addition of 1/8 teaspoon per serving would have raised the sodium level to less than 500 milligrams.

I worry about the sodium level in the soy sauce.

Take severe hyponatremia, a low sodium level in the blood, as an example.

If the patient's sodium level is 120, we can put 120 in the liquid.