Bacillus indicus HU36 is a spore-forming bacterium that produces various carotenoid pigments, such as astaxanthin, zeaxanthin, and α-carotene. These pigments have a putative protective role against UV irradiation and oxygen-reactive forms. The Royal Holloway University of London (RHUL) conducted an exhaustive study of these pigmented Bacillus species, identifying a diverse range of spore-forming Bacillus containing carotenoid pigments with potential probiotic properties and health benefits. The European Union’s COLOSPORE program-grant further researched these carotenoid-producing bacteria and identified two promising strains, Bacillus indicus HU36 and Bacillus firmus GB1, which are gastric-stable and safe for consumption. These strains have been licensed exclusively to Viridis Biopharma for incorporation into foods. Bacillus indicus HU36, with its yellow-orange pigment, is one of the two shortlisted strains for potential use in various food products.
