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Though numerous valuable compounds from red algae already experience high demand in medicine, nutrition, and different branches of industry, these organisms are still recognized as an underexploited resource. This study provides a comprehensive characterization of the chemical composition of 15 Arctic red algal species from the perspective of their practical relevance in medicine and the food industry. We show that several virtually unstudied species may be regarded as promising sources of different valuable metabolites and minerals. Thus, several filamentous ceramialean algae ( Ceramium virgatum ,  Polysiphonia stricta ,  Savoiea arctica ) had total protein content of 20–32% of dry weight, which is comparable to or higher than that of already commercially exploited species ( Palmaria palmata ,  Porphyra  sp.). Moreover, ceramialean algae contained high amounts of pigments, macronutrients, and ascorbic acid.  Euthora cristata  (Gigartinales) accumulated free essential amino acids, taurine, pantothenic acid, and floridoside. Thalli of  P. palmata  and  C. virgatum  contained the highest amounts of the nonproteinogenic amino acid β-alanine (9.1 and 3.2 μM g −1  DW, respectively). Several red algae tend to accumulate heavy metals; although this may limit their application in the food industry, it makes them promising candidates for phytoremediation or the use as bioindicators.

Chemical Composition and Potential Practical Application of 15 Red Algal Species from the White Sea Coast (the Arctic Ocean)