Beta-Sitosterol Research & Evidence

SupplementScience.ai Editorial Team·Evidence-Based Supplement Research

Published Mar 12, 2026

This content is for informational purposes only and does not constitute medical advice. Consult your healthcare provider before starting any supplement. Full disclaimer

Evidence Level

Moderate

Beta-sitosterol has a solid evidence base for BPH. A 1999 Cochrane-style review by Wilt et al. analyzing 4 RCTs (n=519) concluded that beta-sitosterol significantly improves urologic symptoms and flow measures in men with BPH. The landmark Berges 1995 Lancet trial remains the most cited, showing a 7.4-point IPSS improvement vs 2.9 for placebo. For cholesterol, a 2008 meta-analysis confirmed plant sterols reduce LDL by 8-10% at 2g/day.

Evidence by Condition

Condition	Studied Dose	Evidence
BPH / prostate health	60-130mg daily in divided doses	Strong
LDL cholesterol	800mg-2g daily as plant sterol blend	Moderate
Cardiovascular prevention	2g daily plant sterols (FDA guideline)	Moderate
General prostate maintenance	60mg daily	Moderate
Anti-inflammatory support	100-130mg daily	Emerging

Full Beta-Sitosterol Guide

References

Berges RR, Windeler J, Trampisch HJ, Senge T (1995). Randomised, placebo-controlled, double-blind clinical trial of beta-sitosterol in patients with benign prostatic hyperplasia. The Lancet. DOI PubMed
Wilt TJ, MacDonald R, Ishani A (1999). Beta-sitosterol for the treatment of benign prostatic hyperplasia: a systematic review. BJU International. DOI PubMed
Klippel KF, Hiltl DM, Schipp B (1997). A multicentric, placebo-controlled, double-blind clinical trial of beta-sitosterol for benign prostatic hyperplasia. British Journal of Urology. DOI PubMed
Abumweis SS, Barake R, Jones PJH (2008). Plant sterols/stanols as cholesterol lowering agents: a meta-analysis of randomized controlled trials. Food & Nutrition Research. DOI PubMed