we examined the effect of moderately increased and of marginal continued dietary supplementation of vitamin a ( retinyl acetate ) and the effect of lack of dietary vitamin a on the initiation and promotion stages of mammary tumorigenesis in female sprague-dawley rats treated with a single low ( 0.5 mg/100 g body weight ) or very low ( 0.1 mg/100 g body weight ) dose of i.v.-administered 7,12-dimethylbenz ( a ) anthracene .
C0073109
retinyl acetate
C0042839
vitamin a