PubMed Studies
75
PubChem CID
About
Beta-sitosterol is a plant sterol structurally similar to cholesterol. Used for BPH, cholesterol reduction, and immune modulation.
How it works (mechanism of action)
Provides targeted nutritional substrate or pharmacological activity for specific biochemical pathways not adequately supported by standard dietary intake. Mechanism involves enzyme cofactor provision, receptor modulation, or membrane structural modification.
📊 Effectiveness
BPH symptoms
Evidence Grade A · 14 studies · n=1,600 · Meta-analysis available
Cholesterol reduction
Evidence Grade B · 18 studies · n=2,200
Evidence grades: A=Strong RCT evidence · B=Good clinical trials · C=Limited trials · D=Preliminary/traditional
👥 Safety by Population
🚫 Contraindications & Warnings
Sitosterolaemia: contraindicated. Reduces fat-soluble vitamin absorption at high doses. Generally well tolerated.