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Cardiometabolic

Beta Sitosterol

Also known as: β-sitosterol, plant sterol, phytosterol, sitosterol

A
Evidence

Beta sitosterol is a plant sterol that helps reduce LDL cholesterol absorption in the intestines, with consistent evidence supporting modest cholesterol-lowering effects. Daily intake of 1.5-2.4 g has been shown to reduce LDL cholesterol by approximately 10% in clinical studies.

Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.

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Primary uses

  • BPH symptoms
  • Urinary flow
  • Prostate health
  • Cholesterol management
  • Cardiovascular health
  • Prostate health support

How it works

  • Competitive inhibition of dietary and biliary cholesterol absorption in the small intestine
  • Displacement of cholesterol in mixed micelles

Dosage

Typical range
1.5-2.4 g daily
Timing
With meals for optimal absorption
With food
Required; take with fat-containing meals to enhance efficacy
Duration
Benefits typically appear after 2-4 weeks of consistent use; long-term use is safe
Special populations
Safe for most adults; limited data in children and pregnancy

Forms

  • Beta-sitosterol extract
  • Plant sterol complex
  • From saw palmetto or other sources
  • Softgels· 70/100
  • Capsules· 70/100
  • Powder· 70/100
  • Fortified foods· 70/100

Safety

Common side effects

  • Rare; generally very well tolerated
  • Occasional mild gastrointestinal symptoms at high doses

Contraindications

  • Sitosterolemia (rare genetic condition)

Evidence notes

Strong evidence for BPH urinary symptoms

Grade A: Multiple well-designed human trials support the main claims.

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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.