 Theophicy, brown algae, are abundant in cold and temperate seas, and contain high concentrations of bioactive compounds called fluorotanins. These compounds are composed of multiple fluoroglysenol units and are known to possess a wide range of biological activities, including antioxidative, anti-inflammatory, and antimicrobial properties. Previous studies have shown that these compounds can be found in two forms, either within the cell walls of brown algae or within the cell itself. This study compared the biological activities of these two forms of fluorotanins, finding that while the intracellular form was more potent against oxidation, the extracellular form was more effective at killing bacteria. Additionally, this study also showed that the extracellular form had significantly reduced cytotoxicity, making it a potentially useful tool for treating diseases such as Alzheimer's and Parkinson's. This article was authored by Daria Mechelkina, Elena Tsvikova, Anastasia Orlova, and others. We are article.tv, links in the description below.