beta-carotene ( bc ) and canthaxanthine ( cx ) , two carotenoids with and without pro-vitamin a activity , respectively , were found to help to prevent benzo [ a ] pyrene ( bp ) -induced skin carcinogenesis in the dark and bp photocarcinogenesis ( uv 300-400 nm ) when given as an oral supplement to female swiss albino mice .
C0053396
beta-carotene
C0007271
carotenoids