A method for decreasing proliferation of cancer cells comprises the steps of administering a sensitizer. Sensitizers can include selenium, fish oil, and a combination of selenium and fish oil to a cancer cell. The method contemplates that the selenium and fish oil are administered in an amount effective to respectively increase the sensitivity of the cancer cells, and the administration of the combination of selenium and fish oil are administered in an amount effective to synergistically increase the sensitivity of the cancer cells more than the selenium or the fish oil alone. The method additionally exposes cancer cells to temperatures in excess of 37° C.
