Abstract: The present invention pertains to a method for the efficient production of carotenoids. In particular, the present invention is directed to a method for producing carotenoid and carotenoid containing cells, especially astaxanthin and astaxanthin-containing cells, by generating mutant microorganisms belonging to the photoautotrophic algae of the Class Chlorophyceae and culturing same. The present invention further relates to methods of generating microorganisms producing high yields of carotenoids, in particular astaxanthin, products containing said microorganisms or said carotenoids, and the use of said carotenoids produced by the microorganisms according to the present invention and deposited mutant strains generated from said microorganisms.

Abstract: A process of obtaining lutein in a high yield from green algae is described. Lutein and lutein-enriched products obtained by the process, which are suitable for use as dietary supplements and/or food additives, or cosmetic or pharmaceutical raw materials, are also described.

Abstract: A process of obtaining zeaxanthin in a high yield from blue-green algae is de-scribed. Zeaxanthin and zeaxanthin-enriched products obtained by the process, which are suitable for use as dietary supplements and/or food additives, are also described.