Bioactivity profile of three types of seaweed as an antioxidant, UV-protection as sunscreen and their correlation activity

Seaweed is one of the marine algae that have antioxidant sources because it contains bioactive compounds such as carotenoids, phenol compounds and their derivatives, polysaccharide sulfate, and vitamins. Algae consist of three major groups namely brown algae (phaeophyta), red algae (rhodophyta), and green algae (chlorophyta). The purpose of this study was to determine the bioactivity profile of seaweed extract Eucheuma cottoni, Sargassum polycystum and Caulerpa racemosa so that it could be developed as a cosmetic raw material. The three types of seaweed were extracted by maceration and bioactivity testing was carried out as an antioxidant using the ABTS radical reduction method and bioactivity testing as UV-protection with the parameters of the percentage transmission of erythema, pigmentation and Sun Protective Factor (SPF). The results showed that C. racemosa extract provided a very strong antioxidant activity and was able to protect the skin from UV exposure with an SPF value that was categorized as ultra-protection. Antioxidant activity of the three types of seaweed is positively correlated to the protective effect based on the SPF value.