Higher dietary salt intake does not lead to sustained increases in blood pressure in healthy humans over months and years as the body self-regulates.
Evidence from Studies
Supporting (2)
Sodium Intake and Biological Sex Influence Urinary Endothelin-1 in Salt-Resistant Adults: A Pilot Study.
When people ate more salt, their bodies kicked out the extra salt through urine using a natural system called ET-1 — meaning their bodies adjusted to keep blood pressure stable, which supports the idea that salt doesn’t always raise blood pressure long-term.
Dietary sodium intake does not alter renal potassium handling and blood pressure in healthy young males
This study gave people different amounts of salt for a week each and found their blood pressure only went up a tiny bit — and their kidneys adjusted perfectly to handle the extra salt without keeping pressure high. So yes, the body seems to self-regulate.
Contradicting (2)
This study found that eating a lot of salt over time raises blood pressure in rats because it messes up the body’s natural brake system for controlling blood pressure — meaning the body doesn’t fully fix it, even over time.
Sodium balance, arterial pressure, and the role of the subfornical organ during chronic changes in dietary salt.
This study used rats, not people, and found that even when they ate a lot of salt, their blood pressure didn’t stay high — but that doesn’t prove the same thing happens in humans.