Whole grains linked to lower hypertension risk in cohort studies
Higher whole-grain intake was associated with lower hypertension risk across studies following people over time. Refined grains showed no clear association, and whole-grain results varied substantially.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
Higher whole-grain intake was associated with a lower risk of developing hypertension, or high blood pressure, compared with lower intake. Refined grains showed no clear association. Because these were observational studies, the findings cannot establish that whole grains prevented hypertension, and the whole-grain results differed substantially across studies.
This abstract-based summary lacks participant details and follow-up lengths. Whole-grain results varied substantially between cohorts, and few studies examined refined grains.
What researchers found
Higher versus lower whole-grain intake
The pooled relative risk had a 95% confidence interval of 0.59–0.93 times the risk, showing uncertainty about its size. Follow-up lengths were not reported; this does not describe absolute risk differences.
What the comparison measures
The review examined whether grain intake and later hypertension risk moved together across cohorts. Participants were followed over time, but these comparisons cannot establish that changing grain intake caused the observed differences.
Why refined grains remain uncertain
The refined-grain analysis found no clear association with hypertension. That does not prove the absence of an effect. With fewer studies available, the abstract leaves the uncertainty around refined grains unresolved.
The original publication
Whole grain and refined grain consumption and the risk of hypertension: a systematic review and meta-analysis of prospective studies.
Aune D, Metoudi M, Sadler I et al.
Sci Rep · 2025
- PubMed ID
- 40592949
- Record checked
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