ABSTRACT Sargassum sp. is one of the brown seaweed that contains bioactive compounds, which has antioxidant and alpha glucosidase inhibitor activity. This research aimed to determine the yield, secondary metabolic, total phenolic, antioxidant, and alpha glucosidase inhibitor from the extract and fractions of Sargassum sp. The research method used was an experiment by extracting Sargassum sp wi…