The Study
Blood Pressure Effects of Sodium Reduction
This study looked at lots of experiments where people ate less salt and found that, on average, their blood pressure went down. It’s like checking many science fair projects and saying, 'Yep, less salt usually means lower blood pressure.' But it doesn’t prove it stops heart attacks — just that it lowers a number doctors care about.
Analysis score
Maximum 100 for a systematic review with meta-analysis.
Where the score came from
Cutting salt from your food lowers your blood pressure, and the less salt you eat, the lower your pressure goes — all the way down to very low levels.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 566 / 100
Quality score
The highest quality evidence. Systematic reviews and meta-analyses that pool randomized controlled trials, giving the most reliable summary of experimental evidence.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — a 15 mm Hg drop in systolic BP is as big as the effect of many blood pressure medications, and reduces stroke and heart attack risk significantly.
- 2Cutting salt from 7.6g/day to 1.5g/day lowers systolic BP by 15 mm Hg and diastolic by 10 mm Hg.
- 3People with high blood pressure see 2.5x more benefit than those without.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Circulation
Year
2021
Authors
T. Filippini, M. Malavolti, P. Whelton, A. Naska, N. Orsini, M. Vinceti
Related Content
Claims (5)
Cutting down on salt can lower your blood pressure, and the more salt you cut, the more your blood pressure drops—especially if it was already high to begin with.
If you eat less salt, your blood pressure goes down steadily — even at very low salt levels, cutting back more still helps lower it.
Cutting back on salt helps lower blood pressure, and this works just as well whether you do it for a few weeks or up to a year—only a tiny bit less after a long time.
If you cut down how much salt you eat from a lot to very little, your blood pressure will go down—by about 15 points for the top number and 10 points for the bottom number—and this works best if you already have high blood pressure.
Cutting down on salt lowers blood pressure more for people who already have high blood pressure than for those with normal blood pressure—about 2.5 times more.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.