Prospects for the Use of Commercial and Potentially Commercial Brown Algae of the Far Eastern Seas as a Source of Polyphenols

The properties of polyphenol extracts from marine brown algae of the families Laminariaceae, Alariaceae, Arthrothamnaceae, Costariaceae, Cystoseiraceae, and Fucaceae were studied. The release of polyphenols from algae was determined by the species affiliation and depended on the nature of the extractant. According to the content of total polyphenols and antioxidant activity, the maximum effect was observed in the ethanol extracts from algae of the genera Agarum, Thalassiophyllum, Fucus, Stephanocystis, and Arthrothamnus. Aqueous extracts from algae of the genera Saccharina, Alaria, and Costaria, were highly effective. The greatest yield of total polyphenols with high antioxidant activity (including that of phlorotannins) was found in Agarum turneri extracts. Fucus evanescens, Thalassiophyllum clathrus, and Stephanocystis crassipes can also be considered as promising sources of polyphenols with high antioxidant activity. Among aqueous extracts, high antioxidant activity was also found in the Costaria costata extract.