Although selenium has been lately shot down by the SELECT (selenomethionine) study, it was just a statistical shoot down. There
is reason to believe that
for some prostate cancers selenium helps and
for other prostate cancers selenium worsens: Chan, et al., "Plasma Selenium, Manganese Superoxide Dismutase, and Intermediate- or High-Risk Prostate Cancer" (2009, J. Clin. Oncol. 27: 3577-3583). Maybe my SOD2 genotype is AA, and the selenium helped.