In brief: Spirulina products usually come from cultivated Arthrospira species. Biologically, they are cyanobacteria.
What does a serving actually provide?
| Topic | Interpretation |
|---|---|
| Protein | High per 100 g, small per tablet serving |
| Vitamin B12 | Not reliably bioavailable |
| Quality | Batch testing matters |
| Detox | Not clinically established |
Contamination is a real issue
Depending on the product, microcystins, other cyanotoxins, heavy metals or microorganisms can be relevant. Controlled cultivation and testing reports matter.
FAQ
Is Spirulina an alga?
Colloquially yes, biologically it is a cyanobacterium.
Does Spirulina provide enough B12?
No.
Does Spirulina reliably strengthen immunity?
No general protective effect is established.
What matters when buying?
Origin and batch testing.
Conclusion
Spirulina tablets are not a nutritional miracle. Serving size, B12 limitations and product purity matter most.
