In vitro antioxidant activities of selected seaweeds from Southeast coast of India

ObjectiveIn vitro antioxidant activities of three selected Indian seaweeds viz., Halimeda tuna (H. tuna), Turbinaria conoides (T. conoides) and Gracilaria foliifera (G. foliifera) were evaluated.MethodsTotal antioxidant activity, total phenolic content, and reducing power of crude methanol and diethyl ether extracts were determined.ResultsTotal phenolic content and total antioxidant activity were higher (1.231±0.173 mg GAE/g, 1.675± 0.361 mg GAE/g) in T. conoides respectively. Reducing power of crude methanol extract increased with concentrations of the extract. The Fourier transform-infra red spectrum analysis revealed the presence of polyphenolic signals. The seaweed extracts displayed moderate antioxidant activity compared to gallic acid standard.ConclusionsThe seaweeds could be considered for curing diseases from oxidative deteriorations.