Overview
Blue-green algae extract is obtained from cyanobacteria, primarily through aqueous or solvent-based extraction of cultivated or wild-harvested biomass. Unlike true algae, cyanobacteria are prokaryotic organisms capable of photosynthesis. The extract's composition varies by species, with Spirulina and Aphanizomenon being most commercially significant. Modern production employs controlled bioreactors or open pond systems, followed by centrifugation, filtration, and spray-drying. The extract's value stems from its unique bioactive compounds, including phycobiliproteins like phycocyanin (a potent antioxidant with blue pigment) and mycosporine-like amino acids (MAAs) for UV protection.
Physical and Chemical Properties
The extract's dark green color results from chlorophyll-a (primary photosynthetic pigment) and phycocyanin. Its protein content often exceeds 60% dry weight, with a complete amino acid profile including all essentials. Lipids constitute 5-10%, predominantly GLA, an omega-6 fatty acid. Thermal stability varies by component—phycocyanin degrades above 60°C, while carotenoids withstand higher temperatures. The powder exhibits hygroscopicity, requiring moisture-proof packaging. Its isoelectric point (pH 3-4) affects solubility in different formulations.
Main Applications
In nutraceuticals, the extract serves as a vegan protein source and immune modulator, often encapsulated or blended into powders. Cosmetic formulations leverage its anti-inflammatory phycocyanin for serums and its MAAs in suncare products, replacing synthetic dyes. Agriculture utilizes it as a biostimulant, enhancing crop resilience through bioactive peptides. The food industry employs it as a natural blue colorant (E18) in confectionery and beverages, while aquaculture incorporates it into feed for pigment enhancement in ornamental fish.
Safety and Storage
Quality extracts undergo microfiltration to remove endotoxins and hepatotoxic microcystins (potential contaminants in wild strains). Suppliers should provide certificates analyzing heavy metals (lead <0.5 ppm, arsenic <1 ppm) and microbial counts (<10,000 CFU/g). Liquid extracts require refrigeration and preservatives like potassium sorbate. Powdered forms remain stable for 2-3 years when vacuum-sealed with oxygen absorbers. Occupational safety measures include dust control during handling to prevent respiratory irritation.
B2B Procurement Guide
Bulk buyers should prioritize suppliers with ISO 22000 or NSF certification, especially for food-grade products. Request batch-specific Certificates of Analysis (CoA) verifying: 1. Phycocyanin content (minimum 15% for premium grades) 2. Absence of microcystins (<1 µg/g) 3. Solubility in target formulations Consider minimum order quantities (MOQs)—typically 25kg for powders—and lead times (4-8 weeks for customized extractions). Sustainable sourcing is increasingly important; inquire about water recycling in production and carbon-neutral shipping options.
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