The Study
Association between low-sodium salt intervention and long-term blood pressure changes is modified by ENaC genetic variation: a gene-diet interaction analysis in a randomized controlled trial.
This study says that people with a certain gene pattern seemed to have their blood pressure drop more when they used low-sodium salt — but we don’t know if the salt was randomly given or if other things could have caused the change. So we can’t say the salt definitely caused the drop, just that it might be linked.
Analysis score
Maximum 72 for a cohort study.
Where the score came from
Scientists tested if using a special low-sodium salt helps lower blood pressure more for people with certain genes. They found that people with a specific genetic pattern had much bigger drops in their top blood pressure number.
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 551 / 100
Quality score
Groups of people are followed over time to see who develops an outcome. Strong for identifying risk factors and associations, but cannot prove causation as firmly as RCTs.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — a 9-point difference in systolic BP is clinically meaningful and could reduce stroke or heart attack risk.
- 2People with high genetic risk: SBP dropped 18.77 mmHg with low-sodium salt vs.
- 39.58 mmHg with normal salt.
- 4People with low genetic risk: SBP dropped 15.71 vs.
- 514.62 mmHg — almost no difference.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Food & function
Year
2023
Authors
Hao Sun, Ying Zhou, Shuyi Jiang, Dan Zhao, Huamin Li, Yue Lu, Bing Ma, Bo Zhou
Related Content
Claims (4)
People with high blood pressure who have certain genes that make them more prone to high blood pressure tend to see their blood pressure drop more when they switch to low-sodium salt, compared to others with those same genes but lower risk.
If people with high blood pressure switch to a low-sodium salt for three years, their top blood pressure number (systolic) tends to go down—but their genes don’t seem to change how much their bottom number (diastolic) changes.
For people with high blood pressure, using a special low-sodium salt for three years might lower their systolic blood pressure more than regular salt—especially if they have certain genes that make them more likely to have high blood pressure. The drop is about 9.2 points on average.
Some groups of people, depending on their ancestry or where they’re from, have bodies that react differently to salt—some get a bigger spike in blood pressure when they eat salty food, and that’s because of differences in their genes.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.