Spirulina

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The short answer

Provides protein and pigments; small trials report lipid or allergy outcomes, but products vary.

Evidence and scope: Mixed evidence
This status does not grade the ingredient for every goal, outcome, or person.
Important limitation: Trials are inconsistent or small, so a reliable clinically important benefit is not established.
Before deciding: Key concern: Autoimmune disease, immunosuppressants, PKU, anticoagulants, pregnancy, and contamination require review.

01 / PRACTICAL GUIDE

Dose, absorption, and combinations

These are indication-specific reference or studied ranges—not a personalized prescription. Start with the objective, then check the form, label, medicines, and health conditions.

Reference range by objective

Meeting usual needs1–8 g/day in trials; no established health dose

Reference or studied range—not a personalized prescription. The product label or a clinician may specify a different dose.

Dose source ↗

More is not automatically better. A clinician or product label may specify a different amount.

Absorption / solubilityFat/water classification is not the key factor

Fat/water solubility is not the useful decision point; preparation, fluid, timing, or strain identity matters more.

How it is commonly taken

Use a product tested for microcystins, bacteria, and heavy metals.

Do not combine casually

Autoimmune disease, immunosuppressants, PKU, anticoagulants, pregnancy, and contamination require review.

Dose and use source ↗

Dose and use links lead to primary or official source material. Search links are discovery tools, not proof that every returned paper applies.

02 / EVIDENCE

What the research says

We keep supportive, mixed, negative, safety, and contextual findings together. The headline never replaces the underlying papers.

1research papers in this ledger

5unique primary studies represented

230unique participants represented

These are audited counts for this JIVANA collection, not search-result totals. Participants are counted once when multiple papers use the same cohort; review papers are not added again to participant totals.

Open the research timelineResearch timeline

Entries are ordered by publication year. A study period appears only when the source reports it.

2021

Mixed or qualifiedPMID 34578932

Spirulina supplementation and blood pressure

Pooled systolic and diastolic pressure fell by about 4.6 and 7.0 mmHg, but only five small, short trials contributed and systolic heterogeneity was substantial. Confirmation, ambulatory measurements, and cardiovascular outcomes are lacking.

Published: 2021Duration: 2–12 weeksn=230 participants5 primary studies represented

Study design and methods

Design: Systematic review and meta-analysis of 5 randomized controlled trials
Population: 230 participants in blood-pressure trials
Intervention: Spirulina 1–8 g daily versus control
Outcome: Systolic and diastolic blood pressure

Open research record ↗

Unscreened discovery appendix—not evidence117 candidate publicationsSearch run: Aug 21, 2026

Complete for the displayed PubMed query at the search timestamp—not for all databases or every possible synonym. Candidates can be irrelevant, duplicate the same study, or report negative findings. They are never summed as evidence or participants until screened.

03 / SOURCES

Start with the source material

Official evidence overviewPubMed bounded human-evidence search Live PubMed discovery searchNational Library of Medicine

The live search is for discovery only. Search-result counts change and are not included in the audited totals above.

Recent PubMed discovery recordsDirect links to the first 12 records returned by the reproducible search. These are discovery candidates—not reviewed summaries or a count of supportive findings.

04 / EXPERT CONTEXT

Expert context—not evidence

Expert positions are dated context—not scientific evidence. They never raise the evidence status or become consensus by repetition.

No direct, source-verified endorsement is currently recorded. Research authorship or discussion alone is not treated as endorsement.