Effects of a phytotherapeutic agent, PC‐SPES, on prostate cancer: a preliminary investigation on human cell lines and patients

In this preliminary study, an extract of the phytotherapeutic agent PC-SPES was active in suppressing the growth of cultured hormone-sensitive and -insensitive prostate cancer cell lines. In the small clinical study, PC-SPES therapy decreased serum PSA levels in most patients. However, a longer follow-up and more patients will be required to evaluate the long-term efficacy of this new phytotherapy.