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In this study proximate compositions and total phenolic contents in extracts of

15 seaweeds from Semporna, Sabah, were determined. In general, results of proximate analysis for all seaweeds showed that moisture content (75.95-96.03%) was the most abundant in seaweed, followed by carbohydrate (26.86-74.10% dry weight basis), crude fiber (4.03-34.71% dry weight), and ash (6.05-45.04% dry weight), crude protein (5.22-17.28% dry weight), and crude fat content (0.15-0.84% dry weight). The total phenolic contents were determined using Folin-Ciocalteu reagent method based on the standard calibration curve of phloroglucinol measured at 740 nm using UV-Visible Spectrometer