What is the recommended dose of Spirulina?

- **General health:** 2-10g/day dried spirulina powder - **For lipid improvement:** 4-10g/day - **For allergy relief:** 2g/day - **Higher doses more effective for metabolic outcomes**

Is Spirulina safe to take daily?

Spirulina is rated "Prescription Interactions" based on clinical evidence. - **Common:** Diarrhea, headache, dizziness, abdominal pain (also seen with placebo) - **Rare (case reports):** Rhabdomyolysis, anaphylaxis, liver toxicity, autoimmune skin condition exacerbation

Does Spirulina interact with any medications?

Spirulina has 6 known drug interactions, including interactions with Hepatotoxic drugs, BP-lowering drugs, Blood-glucose-lowering drugs. Check with your doctor before combining with prescription medications.

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Ingredient Research

Graded against 173,636 supplements + 177 published clinical interactions, sourced from PubMed, FDA CAERS, openFDA, NIH DSLD

Spirulina

STRONG EVIDENCESupplementLast updated April 5, 2026

AVELOR SUMMARY

Spirulina is a cyanobacterium (not technically algae) rich in nutrients, antioxidants, and bioactive pigments. Our research, from 46 RCTs, 5 meta-analyses, and 4,957 participants, shows Grade A evidence for reducing oxidative stress and moderate evidence for improving lipid profiles, blood glucose, body composition, and allergy symptoms. The main concern: contamination. Spirulina can accumulate heavy metals and toxic cyanobacteria from its growth environment. Quality sourcing is critical.

EVIDENCE GRADES

Oxidative Stress BiomarkersStrong

Lipid profiles (LDL, HDL, total cholesterol)Moderate

Blood GlucoseModerate

Weight/Body FatModerate

Allergy SymptomsModerate

OPTIMAL DOSAGE

General health: 2-10g/day dried spirulina powder
For lipid improvement: 4-10g/day
For allergy relief: 2g/day
Higher doses more effective for metabolic outcomes

Scan a supplement containing Spirulina

DRUG INTERACTIONS

Hepatotoxic drugsSevere

Additive liver risk

Monitor liver function.

BP-lowering drugsMinor

Additive BP reduction

Monitor BP.

Blood-glucose-lowering drugsMinor

Additive glucose reduction

Monitor blood glucose.

CYP1A2/CYP2E1 substratesUnknown

May alter drug levels

Be aware.

ImmunosuppressantsUnknown

May reduce drug effectiveness

Use caution.

Blood thinnersUnknown

May increase bleeding risk

Monitor.

SAFETY PROFILE

Side Effects

Common: Diarrhea, headache, dizziness, abdominal pain (also seen with placebo)
Rare (case reports): Rhabdomyolysis, anaphylaxis, liver toxicity, autoimmune skin condition exacerbation

Drug Interactions

Precautions

Pregnancy/Breastfeeding: Avoid. Safety not established. Contamination concerns.
Children: Avoid. Potential microcystin contamination risk.
Autoimmune conditions: Use with caution. May exacerbate.
Dose AI finding: Pure Hawaiian Spirulina had elevated cadmium.

Quality Concerns

Heavy metal contamination possible depending on growth environment
Cyanobacteria contamination can introduce hepatotoxic microcystins
Third-party testing essential

WADA Status

Not Prohibited.

WHO SHOULD BE CAREFUL

QUALITY CONCERNS

Heavy metal contamination possible depending on growth environment
Cyanobacteria contamination can introduce hepatotoxic microcystins
Third-party testing essential

HOW AVELOR SCORES THIS

Present at 2-10g, third-party tested:✅ Green flag — strong evidence for antioxidant and metabolic benefits

No third-party testing:⚠️ Yellow flag — contamination risk is real

From unknown/unverified source:🔴 Red flag — heavy metals and microcystin risk

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Independently graded against 173,636 indexed supplements with 177 published clinical interactions, sourced from PubMed, FDA CAERS, openFDA, and NIH DSLD | Last updated: April 5, 2026

Not medical advice. Based on published clinical research and systematic reviews.

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