Twelve studies with a total of 13,254 participants and 5007 cases of prostate cancer were included in a new study. The relation between plasma/serum selenium and prostate cancer in a nonlinear dose-response meta-analysis showed that the risk decreased with increasing plasma/serum selenium up to 170 ng/mL.
Low selenium status is believed to be common in the UK and Europe, given the low concentration of the mineral in the soil.
Researcchers conclude that selenium appears to play a role in modifying the risk of prostate cancer initiation and progression, and when further research has been carried out to clarify dose-response relationships, there may be a therapeutic role for selenium, but for now they recommend that selenium (be) provided by foods rich in selenium, not supplements.
One of the common sources for selemium in foods are Brazil Nuts, 2 nuts can provide up to 200mcg of selenium which is the suggested the daily amount needed.