Journals › Tropical Agricultural Research
Characterization of Nutritional, Antimicrobial and Antioxidant Prop-erties of Five Seaweed Species in Sri Lanka
Tropical Agricultural Research 37(1): 1–12 · 2026
https://doi.org/10.4038/tar.v37i1.8897
Abstract
The present study assessed the nutritional, antimicrobial and antioxidant properties of five seaweed species in northern coast of Sri Lanka: Kappaphycus alvarezii, Sargassum wightii, Turbinaria ornata, Caulerpa peltata and Caulerpa racemosa. The proximate composition was measured in dried seaweed powder. The antioxidant properties were determined in seaweed water extracts as total phenolic content (TPC), total flavonoid content (TFC), 2, 2- diphe-nyl-1-picrylhydrazyl (DPPH) radical scavenging activity and ferric reducing antioxidant power (FRAP). Crude methanol and crude water extracts were examined for antimicrobial properties against four human pathogens; Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus and Candida albicans. The protein, fat, ash and gross energy con-tents varied from 4.7-26.5%, 0.02-0.05%, 7.6-25.6% and 10-18.7 kJg-1, respectively. The two green seaweeds had the highest (p
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