No significant correlations between the concentration of lycopene and the concentrations of any other carotenoid are observed. We conclude that a diverse array of carotenoids are found in the human prostate with significant intra-individual variation. T he presence of lycopene in the prostate at concentrations that are biologically active in laboratory studies supports the hypothesis that lycopene may have direct effects within the prostate and contribute to the reduced prostate cancer risk associated with the consumption of tomato-based foods . T he future identification and characterization of geometric lycopene isomers may lead to the development of novel agents for chemoprevention studies. Intake of carotenoids and retinol in relation to risk of prostate cancer.
Data regarding carotenoids other than beta-carotene in relation to prostate cancer risk are sparse.
We concluded a prospective cohort study to examine the relationship between the intake of various carotenoids, retinol, fruits, and vegetables and the risk of prostate cancer. All P values resulted from two-sided tests. No consistent association was observed for dietary retinol and risk of prostate cancer.