For people on dialysis, eating less salt for 4 months doesn’t change their blood pressure or fluid buildup, even though it lowers some signs of body inflammation.

For people on dialysis who have high levels of body inflammation, cutting back salt to 2 grams a day for 4 months may lower their inflammation markers without affecting their blood pressure or fluid levels.

For people on dialysis who already have high inflammation, eating less salt may help lower certain body chemicals that cause inflammation, without affecting their nutrition or blood counts.

When healthy young men eat a lot more salt for a week, their kidneys filter blood faster — not because their blood pressure goes up, but because their kidneys just work harder to get rid of the extra salt.

When healthy young men eat a lot more salt, their kidneys filter blood faster — but their blood pressure doesn’t go up much, showing their kidneys can handle extra salt without straining.

When healthy young men eat a lot more salt, their kidneys filter blood faster — up to 40% more — even though their blood pressure only goes up a tiny bit.