What it is
Spirulina platensis is a cyanobacterium often called a blue-green microalga, cultivated for its protein, peptide, vitamin, and pigment content. The cosmetic extract is valued for its amino acids and antioxidant pigments such as phycocyanin and carotenoids, which support a conditioning, protective role in formulas. In sunscreens it is typically included as a supportive botanical that complements the sun-protection actives rather than providing UV filtration itself.
Safety & warnings
Spirulina extract is generally well tolerated in topical use. As with other complex botanical extracts, sensitive individuals may rarely react, and quality depends on cultivation conditions to avoid contaminants; it is not a recognized fragrance allergen.
Origin & sourcing
Derived from cultured Spirulina (Arthrospira) platensis biomass grown in controlled aquatic systems, then processed into a water- or solvent-based extract.
Questions everyone asks
Does spirulina in sunscreen replace SPF?
No. Spirulina extract is a conditioning, antioxidant-rich botanical and does not act as a UV filter; the labeled SPF comes from the dedicated sunscreen actives.
What is spirulina?
It is a blue-green microalga rich in proteins, amino acids, vitamins, and pigments, used in cosmetics as a skin-conditioning extract.