Spirulina

vitamins

★★★★★

Spirulina is a nutrient-dense blue-green algae rich in protein, B vitamins, and antioxidants. It has been traditionally used for centuries and is recognised as a complete protein source containing all essential amino acids.

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Benefits

✓High-quality plant-based protein source

✓Rich in B vitamins and iron

✓Supports immune function

✓May improve endurance and muscle recovery

✓Contains antioxidants and anti-inflammatory compounds

Dosage

Typical Dose

1-3 grams daily

Upper Limit

10 grams daily

Timing

With meals to enhance absorption

Forms & Bioavailability

Powder

High; easily mixed into smoothies and drinks

Tablets

Moderate; convenient for supplementation

Capsules

Moderate; consistent dosing

Side Effects

⚠Nausea or appetite suppression at high doses

⚠Mild headaches during initial use

⚠Constipation or digestive discomfort

⚠Allergic reactions in rare cases

Interactions

⚡May interfere with anticoagulant medications

⚡Can interact with immunosuppressant drugs

⚡May enhance effects of blood pressure medications

Research Summary

Clinical studies demonstrate spirulina's effectiveness in improving protein status and supporting immune markers. Research suggests potential benefits for muscle endurance and lipid profiles, though larger human trials are needed. Quality and contamination levels vary significantly between suppliers.

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The Bottom Line on Spirulina

Spirulina is well-researched with strong evidence supporting its primary benefits.It is most commonly used for high-quality plant-based protein source and rich in b vitamins and iron. As with any supplement, individual results vary. Start with the lower end of the dosage range and assess for 4-8 weeks before adjusting.

About Our Research

This profile is compiled from peer-reviewed research published on PubMed, the NIH Office of Dietary Supplements, and established nutritional science databases. Dosages reflect clinically-studied amounts from human trials where available. We update profiles as new research emerges. This is not medical advice — consult a healthcare professional before supplementing.

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Where to Buy Spirulina

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Goal Guides for Spirulina

See how Spirulina can help with specific health goals:

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Disclaimer: This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement, especially if you have existing health conditions or take medication.