Algae trials found lower pooled blood pressure, with substantial variation
Adult trials of edible algae reported lower pooled blood-pressure readings. Results varied across studies, and the abstract does not describe the control treatments, limiting interpretation of the comparison.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
The pooled analysis found lower systolic and diastolic blood pressure with edible algae interventions, but results varied substantially across trials. These are blood-pressure measurements, rather than evidence of fewer cardiovascular events. Product and participant subgroups showed different results, while a separate analysis did not establish an independent association between algae dose and systolic pressure change.
The abstract omits specific control treatments and details of individual trials. Variation between results limits how confidently the pooled effect applies to a particular algae product, participant group or intervention schedule.
What researchers found
Systolic pressure, the upper blood-pressure reading
Pooled change: -2.05 mmHg (95% CI: -3.80, -0.31) across adult trials lasting at least 4 weeks; specific control treatments were not reported.
An average across varied trials
The review combined trials using different algae types, formats and participant health profiles. The pooled result summarizes that collection of studies; it does not mean every product or every participant experienced the same blood-pressure change.
Why dose remains unresolved
Some dose subgroups had statistically significant reductions, but the separate dose analysis found no independent link with systolic change. That distinction prevents treating subgroup significance as proof that a higher dose produces a greater effect.
The original publication
Edible Algae Reduce Blood Pressure in Humans: A Systematic Review and Meta-Analysis of Randomised Controlled Trials.
Casas-Agustench P, Mínguez S, Brookes Z et al.
J Hum Nutr Diet · 2025
- PubMed ID
- 40726022
- Record checked
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