Spirulina
Also known as: Spirulina platensis, Arthrospira platensis, Blue-Green Algae
A protein-dense microalgae superfood with antioxidant, anti-inflammatory, and immune-supporting properties.
What it is
Spirulina is a cyanobacterium (blue-green algae) that grows in alkaline lakes and is harvested commercially for use as a dietary supplement and food source. It is one of the most nutrient-dense foods available, containing approximately 60–70% protein by dry weight, complete essential amino acids, B vitamins (except B12), iron, beta-carotene, and phycocyanin (the blue pigment with potent antioxidant and anti-inflammatory activity). Clinical research supports applications in antioxidant defense, lipid management, and immune function.
How it works
Phycocyanin and beta-carotene function as antioxidants, scavenging reactive oxygen species and inhibiting lipid peroxidation. Spirulina activates macrophages and NK cells, enhancing innate immunity. It inhibits histamine release from mast cells (relevant to allergic rhinitis). Cholesterol-lowering effects appear related to phytosterol content and bile acid sequestration. It is also rich in gamma-linolenic acid (GLA), an omega-6 with anti-inflammatory properties.
Clinical dose range
3–10 g/day
Most clinical trials use 3–8 g/day. As a protein and nutrient source: 5–10 g/day in powder form added to food or beverages. As a targeted supplement for specific outcomes (allergy, lipids): 3–5 g/day. Take with a meal for best tolerance.
Forms comparison
What to look for on the label
- Certified organic (prevents contamination from agricultural runoff)
- Third-party tested for heavy metals (cadmium, lead, arsenic are common concerns in microalgae)
- Tested for microcystin-producing cyanobacteria contamination
- Phycocyanin content disclosed if marketed for antioxidant applications
Health goals supported
Safety & dosing notes
Contamination risk is the primary concern — only use certified organic, third-party tested spirulina. Phenylketonuria (PKU) patients must avoid (high phenylalanine). Should not replace whole food protein sources. Rare reports of GI upset — start with 1–2 g and increase gradually.
SuppsBuddy treats heavy metal and microcystin testing as non-negotiable quality markers for spirulina. Organic certification is flagged as the minimum acceptable quality baseline. Products from unverified overseas sources without testing data receive a contamination risk flag.
Frequently asked questions
What is Spirulina?
Spirulina is a cyanobacterium (blue-green algae) that grows in alkaline lakes and is harvested commercially for use as a dietary supplement and food source. It is one of the most nutrient-dense foods available, containing approximately 60–70% protein by dry weight, complete essential amino acids, B vitamins (except B12), iron, beta-carotene, and phycocyanin (the blue pigment with potent antioxidant and anti-inflammatory activity). Clinical research supports applications in antioxidant defense, lipid management, and immune function.
How does Spirulina work?
Phycocyanin and beta-carotene function as antioxidants, scavenging reactive oxygen species and inhibiting lipid peroxidation. Spirulina activates macrophages and NK cells, enhancing innate immunity. It inhibits histamine release from mast cells (relevant to allergic rhinitis). Cholesterol-lowering effects appear related to phytosterol content and bile acid sequestration. It is also rich in gamma-linolenic acid (GLA), an omega-6 with anti-inflammatory properties.
What is the typical clinical dose range for Spirulina?
3–10 g/day. Most clinical trials use 3–8 g/day. As a protein and nutrient source: 5–10 g/day in powder form added to food or beverages. As a targeted supplement for specific outcomes (allergy, lipids): 3–5 g/day. Take with a meal for best tolerance.
What forms of Spirulina should I look for?
Certified organic spirulina powder: Most versatile form; verifiable for heavy metal testing; easier to scale dose | Spirulina tablets (compressed): Convenient; dose-accurate; quality depends on the source and testing | Spirulina from unverified sources: High contamination risk with heavy metals and microcystin toxins from freshwater sources
Is Spirulina safe?
Contamination risk is the primary concern — only use certified organic, third-party tested spirulina. Phenylketonuria (PKU) patients must avoid (high phenylalanine). Should not replace whole food protein sources. Rare reports of GI upset — start with 1–2 g and increase gradually. This information is educational and is not medical advice.
How does SuppsBuddy evaluate Spirulina?
SuppsBuddy treats heavy metal and microcystin testing as non-negotiable quality markers for spirulina. Organic certification is flagged as the minimum acceptable quality baseline. Products from unverified overseas sources without testing data receive a contamination risk flag.
Related ingredients
This page is for educational purposes only. These statements have not been evaluated by the FDA. This information is not intended to diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare professional before starting any supplement.