Sargassum spp. was collected manually from the intertidal zone at the Bo Mao beach, which is located in Phathiu bay, Chumphon province, Thailand. Fresh plants were thoroughly removed of their epiphytes, rinsed on the spot with seawater, and then placed in plastic bags. The seaweed samples were again washed with distilled water and dried in the free air. They were ground in a hammer mill (Crompton controls, model series 2000). A sample of 1 kg was taking by quartering, to grind it finely and carry out chemical analysis by triplicate. The proximate composition of the seaweeds is presented in Table 1.