The main purpose of this works is the analysis and identification of tendencies to accumulation of various biological active substances in four species of brown algae (Laminaria saccharina (L.) Lamour, Laminana digitata (Huds.) Lamour, Fucus vesiculosus (L.), Ascophyllum nodosum (L.) LeJolis) from the Barents and White seas depending on a geographical place of growth and taxonomical accessory.