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Head-to-head evidence comparison — which supplement is right for you?
Red Yeast Rice vs Spirulina: Spirulina has the stronger overall evidence (7 vs 7.8/10); they're alternatives for metabolic health — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Spirulina wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
7 of 7 studies with measurable effects showed benefit.
Top outcomes
Verdict
Likely helps
8 of 9 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (2)
Outcomes where both Red Yeast Rice and Spirulina have evidence — compare verdict strength side-by-side.
1200-2400mg providing 10mg monacolin K
Evening (cholesterol synthesis peaks at night)
Standardized extract with verified monacolin K content
3-10g daily
With food to mask taste, Morning for energy, Before meals for appetite effects
Powder or tablets
and 4 more not shown
8-12 weeks
8-12 weeks
8-12 weeks
4-8 weeks
2-4 weeks
Immediate
Efficacy and Safety of Armolipid Plus(®): An Updated PRISMA Compliant Systematic Review and Meta-Analysis of Randomized Controlled Clinical Trials
Nutrients (2021) · Meta analysis · n=1050
Armolipid Plus® was well tolerated.
Safety and Efficacy of the Consumption of the Nutraceutical "Red Yeast Rice Extract" for the Reduction of Hypercholesterolemia in Humans: A Systematic Review and Meta-Analysis
Nutrients (2024) · Meta analysis
The consumption of RYR extract by people with hypercholesterolemia was associated with statistically significant reduction in total cholesterol and LDL-C, whereas it was not associated with an increase in life-threatening side effects.
Impact of Berberine or Berberine Combination Products on Lipoprotein, Triglyceride and Biological Safety Marker Concentrations in Patients with Hyperlipidemia: A Systematic Review and Meta-Analysis
Journal of dietary supplements (2024) · Meta analysis · n=4838
Meta-analysis of 41 randomized trials (4,838 patients) of berberine products, alone or combined with other nutraceuticals such as red yeast rice, for 8-18 weeks.
Systematic Review of the Effects of Plant-Based Foods on Metabolic Outcomes in Adults with MASLD and Comorbidities Such as Obesity, Metabolic Syndrome, and Type 2 Diabetes
Nutrients (2025) · Systematic review
A systematic review of RCTs (2020 to 2025) of plant-based foods in adults with MASLD.
The Role of Chlorella and Spirulina as Adjuvants of Cardiovascular Risk Factor Control: A Systematic Review and Meta-Analysis of Randomised Controlled Trials
Nutrients (2025) · Meta analysis
The analysis found 12 randomised trials of Chlorella and 9 of Spirulina, with 101 to 299 Spirulina participants depending on the outcome.
Edible Algae Reduce Blood Pressure in Humans: A Systematic Review and Meta-Analysis of Randomised Controlled Trials
Journal of human nutrition and dietetics : the official journal of the British Dietetic Association (2025) · Meta analysis · n=1583
Edible algae intake significantly reduced systolic BP (SBP: -2.05 mmHg; 95% CI: -3.80, -0.31; p = 0.022) and diastolic BP (DBP: -1.87 mmHg; 95% CI: -3.10, -0.64; p = 0.001).
Both points come from one 8-week randomised trial in 105 people with mild high cholesterol (PMID 37375586): LDL fell by 16.77% on 3 mg of monacolin K and by 26.46% on 10 mg, on top of lifestyle change, and effectiveness is that percentage fall. The product also contained CoQ10, grape seed and olive leaf extracts, and no severe adverse events occurred. A separate 8-week trial of 200 mg red yeast rice with 2 mg monacolin K in 18 people lowered LDL more than diet alone (PMID 34587702). The 6 mg point was removed because no cited trial tested it, and no cited trial tested more than 10 mg.
AI-estimated from published studies. Interpret as directional guidance.
Spirulina has a higher evidence score (7/10 vs 7.8/10) and wins in 2 of 3 categories.
Both Red Yeast Rice and Spirulina score equally (60) for metabolic health.
No documented interaction was found in the data searched. This does not establish that this exact combination is safe.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.