experiments were carried out in mice demonstrating that dietary carotenoids ( beta-carotene or canthaxanthin ) , starting before cancer initiation and continuing throughout the experiment , have a protective effect against indirect skin carcinogenesis induced by benzo [ a ] pyrene +/- uva and breast cancer induced by 8-methoxypsoralen + uva .
C0007271
carotenoids
C0053396
beta-carotene