This study aims to determine the moisture content, ash content, and sulfate content of Sargassum sp. flour, the extract yield, functional groups, spectral patterns, fucoxanthin content, and antioxidant activity of crude fucoxanthin extract from Sargassum sp. The method used was acomplete randomized design (CRD)non-factorial 3-level treatment experiment using ethanol, acetone, and n-hexane solve…