Results from previous intervention studies have given promising results indicating that certain dietary or lifestyle modifications can influence the progression of prostate cancer, although most of these studies have been of fairly short of duration and based on relatively small numbers of patients. For example, a randomised study showed that men who were given a dietary addition of flaxseeds had a lower percentage of positive cells containing the proliferation marker Ki-67 than men who had not received this addition to their diet. Taken together, the present evidence points towards the possibility for prostate cancer patients to complement with lifestyle-related treatment alternatives to prevent or delay tumor progression.