The effects of selenium intake on cancer have been studied in several clinical trials and epidemiologic studies in humans. Selenium may have a chemo-preventive role in cancer risk as an anti-oxidant, and it might trigger the immune response. At low levels, it is used in the body to create anti-oxidant selenoproteins, at higher doses than normal it causes cell death.
ThE effeCTs Of selEniuM INTaKe on CanceR hAVe BeEn stUdIed in sEveRal CLinicAl TrIaLs and epiDemioLogiC sTudIes iN humAns. selENium MaY have A chemO-preveNTIvE roLe IN CAncer RisK aS an anti-oxidant, and iT mIGHT TriggEr THe iMmune rESponsE. at lOw lEvels, It is UseD in the BOdy To cReatE anti-OxIDanT sEleNoproteins, at hIgher doses than normal it cAUseS cell death.