"Cut the salt" is one of the most repeated pieces of health advice, and for some people it genuinely moves the needle on blood pressure. For others, it barely matters. That difference has a name, salt sensitivity, and a big part of it is written in genes your DNA report reads, including ACE and ADD1.
What salt sensitivity means
Salt-sensitive people show a clear rise in blood pressure when they eat more sodium, and a clear fall when they eat less. Salt-resistant people show little change either way. Research suggests a substantial share of the population is salt-sensitive, and that this trait runs in families, which is exactly the fingerprint of genetics at work. The same salty meal is simply handled differently from one body to the next.
Why your genes shape the response
Blood pressure is regulated by a hormonal system that decides how much sodium and water your body holds onto. Several genes fine-tune that system:
- ACE: a central regulator of the renin-angiotensin system that controls blood vessel tone and fluid balance.
- ADD1: influences how your kidneys handle sodium, a key lever in salt sensitivity.
- AGT and related variants: further shape the hormonal control of blood pressure.
Carrying certain variants tilts you toward a stronger blood-pressure response to sodium, which is useful to know long before a problem appears.
What to do with this
- Lead with potassium. Vegetables, fruit, beans, avocado and other potassium-rich foods help balance sodium and support healthy blood pressure.
- Watch hidden sodium. Most dietary salt comes from processed foods, bread and sauces, not the salt shaker.
- Favour a DASH-style pattern. Plenty of plants, wholegrains and unsalted nuts is the pattern that consistently helps salt-sensitive people.
- Measure, do not guess. If you are salt-sensitive by genetics, a home blood-pressure check shows you what your numbers actually do.
Important: this article is educational and is not medical advice. It does not diagnose high blood pressure or replace monitoring. If you have hypertension or take blood-pressure medication, change nothing without your doctor.
See whether your genes lean salt-sensitive
The Fuel Your DNA Complete report reads 40+ genes, including ACE and ADD1, and turns them into clear, personalised nutrition guidance based on your own DNA. No new test required, just the raw file you already have. Get your Complete report → or try the free DNA intolerance test first.