Compound Profile
Spirulina
Spirulina carries a Avoid / Insufficient Evidence rating.
Last reviewed: •1 source citedReport a correctionProfile-wide ·Avoid / Insufficient
Use extra caution — Contamination risk if poor quality source; caution autoimmune disease. Details
- Evidence
- Insufficient evidence
- Typical onset
- Varies by prep
- Safety rating
- Use extra caution: Use caution
- Best for
- Oxidative Stress, Metabolic Health, Stress Response
- Avoid / review if
- Phenylketonuria Due To Phenylalanine Content, Immunosuppressant Medications Due To Immune Stimulating Effects That May Counteract Them.
Safety
Safety & Cautions
Contamination risk if poor quality source; caution autoimmune disease.
High caution
Caution level: High. Multiple caution categories apply, or the record uses avoid/contraindication language.
- Stimulant-Like ProfileStimulant-like or activating caution language is present.
- Anticoagulant CautionBleeding or anticoagulant-adjacent caution language is present.
Evidence Summary
Profile-wide ·Avoid / InsufficientEvidence lens
Evidence is not strong enough for confident practical interpretation.
InsufficientInsufficient evidence
Human clinical evidence: Present in source signals
Mechanistic / preclinical: Mechanism mapped — Oxidative Stress Modulation · Metabolic Regulation · Lipid Metabolism Support
Research maturity: Theoretical / mechanistic research — Mechanistic or unresolved evidence is kept separate from established human outcomes.
Safety boundary: Safety note available — Contamination risk if poor quality source; caution autoimmune disease.
This profile cites 1 human study.
Evidence Strength
Confidence estimate based on the design quality and consistency of published clinical trials.
Spirulina has an insufficient evidence rating.
AdaptogenStress & MoodLongevity
Citation density
0.6
Sources
3
Effects
5
Research recency
Mixed recency
Evidence Grade
Avoid / Insufficient Evidence
Evaluation of methodological rigor, population reach, and evidence alignment.
- Design Match
- Meta analysis
- Risk of Bias
- Low
- Consistency
- Consistent
Strongest recorded design is a meta analysis, drawn from 4 recorded studies, 3 in people. No disagreement is recorded across them.
How evidence grades work
Each grade reflects the strength and consistency of published human evidence — not marketing claims. Grades are based on study count, design quality, effect size, consistency, and recency.
- Strong
- Multiple RCTs, consistent direction, adequate effect size
- Moderate
- Some RCTs or consistent observational data in humans
- Preliminary / Mixed
- Animal or in-vitro only, or conflicting human data
- Traditional / Theoretical
- Traditional use only; no controlled human trials
Clinical Study Summaries (3)2 human evidence sources · 0 human trials · Participant totals not consistently reported · Consistency not yet classifiable
Filter by study class
Showing 3 of 3 studies.
What the evidence actually shows
This table contains 3 structured sources, including 2 human evidence sources; 0 are human trials.
| Study | Design | N | Dose | Duration | Population | Outcome | Result & magnitude | Source |
|---|---|---|---|---|---|---|---|---|
Background | Meta-analysis Statistically combines results from multiple eligible studies; confidence still depends on the quality, consistency, and directness of those studies. | — | — | — | — | — | An eight-trial synthesis found a small CRP reduction while TNF-alpha and IL-6 were not significantly changed. This biomarker pattern should not be simplified into a general anti-inflammatory treatment claim. | PubMed → |
Background | Meta-analysis Statistically combines results from multiple eligible studies; confidence still depends on the quality, consistency, and directness of those studies. | — | — | — | — | — | A 2025 GRADE-assessed meta-analysis found modest pooled reductions in systolic and diastolic blood pressure with spirulina, with moderate between-study heterogeneity and stronger subgroup signals in some participants with elevated baseline blood pressure or longer interventions. | PubMed → |
Isolated Methylmalonic Acidemia PubMed · 2022 Background | Narrative review Summarizes selected literature without the full prespecified search and selection methods of a systematic review. | — | — | — | — | — | — | PubMed → |
How Spirulina Works
Simplified mechanism pathway based on preclinical and pharmacological evidence. Does not confirm clinical efficacy.
Mechanism Pathway — How Spirulina Works
CompoundTarget / ReceptorMechanismEffect / Outcome
Dosing
- No standardized dose
- No standardized dose is established for this ingredient in our source data. Preparations differ widely, so follow the standardization on the product you actually have and speak to a clinician before starting.
Mechanisms & biological pathways
Preclinical mechanism details from scientific profiles; these represent plausible pathways but do not guarantee clinical efficacy in humans.
- Oxidative Stress Modulation
- Metabolic Regulation
- Lipid Metabolism Support
Botanical Context
Source botanicals and comparison guides related to Spirulina.
Compare & Sourcing
Compare side-by-side tradeoffs or verify active marker guidelines.
Safety first · Harm reduction
This information is educational and not medical advice. Start low, avoid risky combinations, and consult a licensed clinician before making health decisions—especially if you use medications, have diagnosed conditions, or are pregnant/breastfeeding.
Learn how we evaluate confidence, safety, and intensity on the methodology page.
Founder & Head Researcher · Oak Ridge, TN · Last reviewed August 2026
Editorial Review
Checked against primary sources, cited evidence, and contraindication language before publication. Evidence claims, safety language, and affiliate modules are reviewed independently. Not personal medical advice.
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