Sprirulina extract enrich in phenolic antioxidants may provide a promising source of natural antioxidant. Thus, crude organic extracts of S.splatensis possessed strongest free radical scavenging activity. This finding suggests that the presence of electron and/or hydrogen donating constituent in algal organic extracts such as phycocyanin, carotenoid and phenol compounds. However, the positive correlations between phenol, phytosterol and carotenoids contents in Sprirulina and its antioxidant activity is also well documented .Total phenolic, phycocynin, carotenoids and chlorophyll-derived...