Background:Long-term exposure to sunlight can lead to inflammatory responses,skin photoaging and cancers.Plant extracts can serve as effective biological UV(ultraviolet)filters for their UV absorption capacity.Red ric...Background:Long-term exposure to sunlight can lead to inflammatory responses,skin photoaging and cancers.Plant extracts can serve as effective biological UV(ultraviolet)filters for their UV absorption capacity.Red rice extract is rich in phenolic acids,flavonoids,anthocyanins and procyanins has the potential as a biological UV filter.Aims:This study aims to evaluate the potential of red rice extract as a biological UV filter.Forthurmore,exploring the ability of red rice extract to enhance SPF performance and serve as a potential substitute for chemical UV filters.Methods:Using UV absorption spectroscopy,the UV absorption performance of red rice extract was compared with that of three known UV filters.Additionally,using the Folin-Ciocalteu reagent to test the total phenolic acids content of red rice extract and the antioxidant capacity of red rice extract was verified through a 2,2-diphenyl-1-picrylhydrazyl(DPPH)free radical clearance assay,confirming its potential as a biological UV filter.Subsequently,the photoprotective enhancement effects of red rice extract in sunscreen formulations were explored by testing the SPF value with UV2000S.Results:Experiments conducted by adding different concentrations of red rice extract to sunscreen formulations demonstrated that its photoprotective enhancement effects were positively correlated with its concentration.The addition of 1%red rice extract to both oil-in-water(O/W)and water-in-oil(W/O)sunscreen formulations demonstrated good photoprotective enhancement effects,with SPF values increasing by over 10%.Further experiments showed that 1%,3%,and 5%red rice extract could replace approximately 12.82%,19.05%,and 26.09%of traditional UV filters in sunscreen formulations,achieving similar SPF values.Conclusions:These findings suggest that red rice extract is a promising biological UV filter,capable of enhancing SPF values and serving as a viable alternative for traditional UV filters.Red rice extract can be used in sunscreen products and provide photoprotection benefit.展开更多
基金support from Guangdong S&T programme[2024A0505050001].
文摘Background:Long-term exposure to sunlight can lead to inflammatory responses,skin photoaging and cancers.Plant extracts can serve as effective biological UV(ultraviolet)filters for their UV absorption capacity.Red rice extract is rich in phenolic acids,flavonoids,anthocyanins and procyanins has the potential as a biological UV filter.Aims:This study aims to evaluate the potential of red rice extract as a biological UV filter.Forthurmore,exploring the ability of red rice extract to enhance SPF performance and serve as a potential substitute for chemical UV filters.Methods:Using UV absorption spectroscopy,the UV absorption performance of red rice extract was compared with that of three known UV filters.Additionally,using the Folin-Ciocalteu reagent to test the total phenolic acids content of red rice extract and the antioxidant capacity of red rice extract was verified through a 2,2-diphenyl-1-picrylhydrazyl(DPPH)free radical clearance assay,confirming its potential as a biological UV filter.Subsequently,the photoprotective enhancement effects of red rice extract in sunscreen formulations were explored by testing the SPF value with UV2000S.Results:Experiments conducted by adding different concentrations of red rice extract to sunscreen formulations demonstrated that its photoprotective enhancement effects were positively correlated with its concentration.The addition of 1%red rice extract to both oil-in-water(O/W)and water-in-oil(W/O)sunscreen formulations demonstrated good photoprotective enhancement effects,with SPF values increasing by over 10%.Further experiments showed that 1%,3%,and 5%red rice extract could replace approximately 12.82%,19.05%,and 26.09%of traditional UV filters in sunscreen formulations,achieving similar SPF values.Conclusions:These findings suggest that red rice extract is a promising biological UV filter,capable of enhancing SPF values and serving as a viable alternative for traditional UV filters.Red rice extract can be used in sunscreen products and provide photoprotection benefit.
