Spirulina is one of the best-known microalgae worldwide – and also one of the most misunderstood. Often marketed as a "superfood," spirulina is actually an exceptionally nutrient-rich biomass with a long history of use, modern scientific relevance, and fascinating differences in quality.
t what exactly is spirulina? What health benefits have been proven? And how do green, blue, and so-called Hawaiian spirulina differ?
What is Spirulina?
Strictly speaking, spirulina is not an alga, but a cyanobacterial organism (Arthrospira platensis or Arthrospira maxima). It grows in warm, alkaline freshwater lakes and is now cultivated under controlled conditions in aquaculture facilities.
Particularly noteworthy is its nutrient density: approximately 60–70% high-quality protein, all essential amino acids, iron, magnesium, iodine (in trace amounts), B vitamins (including B1, B2, and B3), and secondary plant compounds, especially phycocyanin, chlorophyll, and carotenoids.
irulina is usually consumed as a powder, tablet, or capsule and is also used to color foods and supplements.
Health Benefits – What Does Science Say?
Spirulina is one of the best-researched microalgae. The body of research is extensive, although not conclusive in all areas.
1. Antioxidant Effects
The blue pigment phycocyanin can have strong antioxidant and anti-inflammatory effects. Studies show that it can neutralize free radicals and reduce oxidative stress.
2. Immune System Support
Several human and animal studies suggest that spirulina can increase the activity of NK cells, influence antibody production, and have anti-inflammatory effects.
3. Lipid Metabolism & Heart Health
Meta-analyses show: reduction of total cholesterol, reduction of LDL, and partial reduction of triglycerides.
Studies & Reviews (Selection)
- Belay et al., Journal of Nutritional Science, 2013
- Szulinska et al., European Review for Medical and Pharmacological Sciences, 2017
- Khan et al., Oxidative Medicine and Cellular Longevity, 2020
- Hernández-Lepe et al., Marine Drugs, 2018
Different Spirulina
Green Spirulina (classic)
- Whole spirulina biomass, dried and milled.
- Color: Dark green to blue-green (chlorophyll + phycocyanin)
- Characteristics:
- Contains the full spectrum of nutrients
- rong, slightly "algae-like" taste
- Ideal for tablets, capsules, and functional blends
Blue Spirulina (Phycocyanin)
- An extract from spirulina – almost pure phycocyanin.
- Color: Bright blue
- Characteristics:
- No chlorophyll → mild taste
- Highly antioxidant
- High in protein, but not a complete food
- Usually mixed with maltodextrin for easier processing and stability against heat and moisture
Hawaiian Spirulina
Spirulina (mostly Arthrospira platensis), cultivated under specific conditions in Hawaii.
Special features of Hawaiian spirulina:
- Volcanic soil
- Very clean water
- High levels of sunshine
- Strict quality and pollutant controls
Characteristics:
- Often particularly high phycocyanin content
- Low heavy metal levels
- Premium positioning
"Hawaiian Spirulina" is not a separate species, but rather a promise of quality and origin.
Did you know?
The Aztecs called spirulina "Tecuitlatl" and harvested it from Lake Texcoco in central Mexico. Contemporary accounts from Spanish chroniclers describe how the dried spirulina biomass was used as a protein-rich food source and sold in markets. Harvesting was done using nets or canoes, with the algae being skimmed from the water's surface and then dried in the sun.
Since the 1960s, space agencies such as NASA have been investigating spirulina as a potential food source for long-duration missions. Key factors are its high protein and micronutrient content, rapid growth, and low land and resource requirements. Furthermore, spirulina is theoretically suitable for closed-loop life support systems, where oxygen production and nutrient supply could be combined.
Our Products
We offer spirulina powder and tablets in organic and conventional quality. Browse our products and contact us for a free, no-obligation quote.
Disclaimer
For legal reasons, we would like to point out that some of the above statements require further research and studies to scientifically prove them. Therefore, not all statements can currently be accepted by conventional medicine.
The information contained in this article regarding legal regulations, approvals, and possible uses of raw materials is based on careful research and our current state of knowledge (as of July 2025). However, we assume no liability for the completeness, accuracy, or timeliness of the information.
The legal framework for food and food supplements is subject to constant change. Therefore, the manufacturer or distributor is always responsible for checking the applicable regulations, EU regulations, and approval lists for the use of raw materials and health-related claims.
In case of legal uncertainty, we recommend consulting legal experts or the relevant authorities.