The following is a list of studies supporting the efficacy of Beta-Sitosterol as it relates to reducing symptoms from an enlardged prostate.

• Studies:
• Grillo, Aronowiez, Clinical Study of ProstaGenix as Treatment For BPH, 2018 French Journal De, Urologique'
  (click here to read study)
• A double-blind trial of an extract of the plant Serenoa repens in benign prostatic hyperplasia - British Journal of Clinical Pharmacology, v.18 (1984), pp. 461-62
• A multicentric, placebo-controlled, double-blind clinical trial of b-sitosterol (phytosterol) for the treatment of benign prostatic hyperplasia - British Journal of Urology (1997), 80, pp. 427–432 See this study on pubmed here
• B-Sitosterol for the treatment of benign prostatic hyperplasia: a systematic review - British Journal Of Urologiy International (1999), v83, pp. 976-983
• Beta-sitosterols for benign prostatic hyperplasia (Review) - Cochrane Database of Systematic Reviews 1999, Issue 3. See this study on pubmed here
• Randomised, placebo-controlled, double-blind clinical trial of B-Sitosterol in patients with benign prostatic hyperplasia - Lancet Journal (1995) v345, pp. 1529-1532
• Treatment of symptomatic benign prostatic hyperplasia with B-Sitosterol: an 18-month follow-up - British Journal Of Urologiy International (2000), v85, pp. 842-846
• THE DEVELOPMENT OF BENIGN PROSTATIC HYPERPLASIA AMONG VOLUNTEERS IN THE NORMATIVE AGING STUDY
• Beta-sitosterol Risk Profile Analysis Study
• Treatment of symptomatic benign prostatic hyperplasia with β-sitosterol: an 18-month follow-up:
• Research Study on B-sitosterol as inhibitor of 5a-reuctase
• Study on Beta-sitosterol - Department of Urology, Ruhr-University of Bochum, Herne, Germany
• Study on Beta-sitosterol - Department of Urology, Allgemeines Krankenhaus Celle, Academic Hospital and †Institute of Statistics, Dresden University of Technology, Germany