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Alginate, a heteropolysaccharide extracted from brown algae  Laminaria digitata , has non-toxic status and good physical and chemical properties, was used in this study for encapsulation of the cyanobacterium  Arthrospira platensis . Results indicated that adding  A. platensis  to alginate beads increased the level of mineral elements: magnesium by 55–60 mg/kg, iron by 38–40 mg/kg, and iodine by 88–107 μg/kg, as compared to respective control samples without microalgae addition. Adding  A. platensis  within alginate beads resulted in an increased antioxidative potential and consequent higher inhibition of the radical 2,2-diphenyl-1-picrylhydrazyl (DPPH) by 15–25% compared to the respective control alginate beads. Finally, the content of  beta -carotene in alginate beads fortified with  A. platensis  biomass amounts on average to 51 μg/g. Due to their health-promoting potential, alginate beads enriched with  A. platensis  biomass can, therefore, be used as a functional ingredient in the nutraceutical sector.

international journal of food engineering

The effect of  Arthrospira platensis  (spirulina) addition on the content of selected mineral elements, carotenes, and antioxidant potential in alginate gel beads