Member of the carotenoid family. There are hundreds of carotenoids, including lycopene and lutein. Topically, beta-carotene is potentially a good antioxidant, although this benefit is dose dependent.
References for this information:
The Federation of American Societies for Experimental Biology Journal, August 2002, issue 10, pages 1289–1291
Photochemistry and Photobiology, May 2002, issue 5, pages 503–506