The use of microalgae and cyanobacteria for nutritional purposes dates back thousands of\nyears; during the last few decades, microalgae culture has improved to become one of the modern\nbiotechnologies. This has allowed high amounts of algal biomass to be obtained for use in different\napplications. Currently, the global production of microalgae and cyanobacteria is predominately\naimed at applications with high added value given that algal biomass contains pigments, proteins,\nessential fatty acids, polysaccharides, vitamins, and minerals, all of which are of great interest in the\npreparation of natural products, both as food and in cosmetics. Hence, the bioactive components from\nmicroalgae can be incorporated in cosmetic and cosmeceutical formulations, and can help achieve\nbenefits including the maintenance of skin structure and function. Thalassotherapy involves using\nseawater and all related marine elements, including macroalgae, however, there has been limited\nuse of microalgae. Microalgae and cyanobacteria could be incorporated into health and wellness\ntreatments applied in thalassotherapy centers due to their high concentration of biologically active\nsubstances that are of interest in skin care. This paper briefly reviews the current and potential\ncosmetic and cosmeceutical applications of marine microalgae and cyanobacteria compounds and\nalso recommends its use in thalassotherapy well-being treatments.
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