In this study, the antioxidant activities, total polyphenolic contents of algal extracts from Gongolaria barbata were examined by using ethyl acetate (AcOEt), water(W), and phosphate buffer (PH) as solvents. According to results, EtOH, W, PB showed medium potential with low IC50 values. The highest flavonoid content was detected in W (6.91±0.09 mg/g Ext., maximum phenolic (2.29±0.01 mg GAE/g ex...