The results concerning resveratrol in prostate cancer are mixed: one study suggested it delayed recurrence by extending the prostate-specific antigen (PSA) doubling time by 5.3 months (Paller et al., 2015[124]), while another study found no effect on prostate volume or PSA levels, raising doubts about its efficacy (Kjær et al., 2015[88]). The gene discussed is KLK3; the disease is prostate carcinoma.