People with high blood pressure who aren't taking medication have similar sodium excretion and body fluid levels outside their cells as people with normal blood pressure.

People who excrete more sodium in their urine tend to have more fluid outside their cells.

Sodium excretion levels don't affect blood pressure, heart rate, or how much blood the heart pumps when lying down.

People who pee out more salt tend to have higher blood pressure, and their blood pressure tends to rise faster as they get older—but in whole populations, the average blood pressure and how many people have high blood pressure don’t seem to change based on salt levels.

The levels of various blood chemicals like electrolytes, hormones, and kidney markers don't change based on how much sodium someone excretes in their urine.

Even though people urinate out more salt after drinking this mineral water, their blood pressure doesn’t go up — meaning the body’s salt removal system works fine without raising BP.