Spirulina trials reported changes in cardiovascular risk markers
A review found lower blood pressure and other marker changes, with evidence quality varying by outcome and no reported cardiovascular event results.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
The pooled trials reported lower blood pressure and improvements in several metabolic and inflammation markers with spirulina compared with placebo or control. These are measurements related to cardiovascular health, rather than direct evidence about heart attacks or survival. The abstract does not establish that spirulina prevents cardiovascular disease or clarify its safety.
This abstract-based assessment lacks treatment durations, doses, adverse-event results and confidence intervals. Those omissions limit judgments about the persistence, practical importance and safety of the reported changes.
What researchers found
Weighted mean difference in systolic blood pressure
Spirulina versus placebo or control; treatment duration and assessment timing are not reported.
What trials measured
The researchers pooled randomized trials measuring blood pressure, blood fats, blood sugar, body measurements and inflammatory markers. This broad outcome list describes changes in risk markers, without establishing effects on cardiovascular events.
Confidence differed by outcome
Evidence quality varied: the authors rated weight findings high quality and most other outcomes moderate quality. Findings for LDL cholesterol, fasting blood glucose and glycated hemoglobin received low ratings, warranting more cautious interpretation.
The original publication
Spirulina's impacts on cardiovascular health: Insights from a systematic meta-analysis of RCT.
Shiri H, Soleimani AA, Omidi Sarajar B et al.
Complement Ther Med · 2025
- PubMed ID
- 40953712
- Record checked
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