Cardiometabolic
Beta Sitosterol
Also known as: β-sitosterol, plant sterol, phytosterol, sitosterol
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.
Every Beta Sitosterol product we have scored
| # | Product | Score | Per serving |
|---|---|---|---|
| 1 | NOW Foods Cholesterol Pro | 89 A | $0.65 |
| 2 | Pure Encapsulations CholestePure | 87 A | $0.60 |
| 3 | Pure Encapsulations SP Ultimate | 84 A- | $2.23 |
| 4 | NOW Foods Clinical Strength Prostate Health | 82 A- | $0.97 |
| 5 | Pure Encapsulations CholestePure Plus | 81 A- | $1.10 |
| 6 | Life Extension PalmettoGuard Saw Palmetto, Nettle Root and Beta-Sitosterol | 79 B+ | $0.35 |
| 7 | NOW Foods Beta-Sitosterol Plant Sterols | 79 B+ | $0.37 |
| 8 | Pure Encapsulations Beta-sitosterol | 78 B+ | $0.24 |
| 9 | NOW Foods ADAM Softgels | 76 B+ | $0.54 |
| 10 | NOW Foods Men's Active Sports Multi | 76 B+ | $0.66 |
| 11 | Nature's Way Cholesterol Shield | 75 B+ | $0.57 |
| 12 | Carlson Nutra-Support Prostate | 75 B+ | $2.00 |
Scored on dose accuracy, form, label transparency and third-party testing. Per-serving cost is list price divided by servings per container. No brand pays to be listed or ranked.
Common questions
How much Beta Sitosterol should I take?
The typical range is 1.5-2.4 g daily. Benefits typically appear after 2-4 weeks of consistent use; long-term use is safe
When should I take Beta Sitosterol?
With meals for optimal absorption. Required; take with fat-containing meals to enhance efficacy.
Which form of Beta Sitosterol is best?
Beta-sitosterol extract — Isolated active. Other forms in the catalog: Plant sterol complex, From saw palmetto or other sources, Softgels, Capsules, Powder, Fortified foods.
Is Beta Sitosterol safe?
Commonly reported: Rare; generally very well tolerated, Occasional mild gastrointestinal symptoms at high doses.
Which Beta Sitosterol supplement scores highest?
NOW Foods Cholesterol Pro, at 89/100. Scored on dose accuracy, form, label transparency and third-party testing — no brand pays to be listed or ranked.
Primary uses
- BPH symptoms
- Urinary flow
- Prostate health
- Cholesterol management
- Cardiovascular health
- Prostate health support
What systematic reviews concluded
Outcomes that systematic reviews of Beta Sitosterol reached a verdict on: 3 with a benefit, 1 with no effect. Each is quoted from a review and linked to it on PubMed. How these were read.
Reviews found a benefit (3)
“Intake of plant sterol/stanol supplements decreased LDL-cholesterol concentrations by 12 mg/dL (0.31 mmol/L) (95% CI -0.39 to -0.23; P<0.000) compared with placebo.” PMID 24144075 · 6 reviews
“moderate reductions in LDL-C and total cholesterol” PMID 42275989 · 2 reviews
“small important improvements in apoB, hs-CRP and apoC-II” PMID 42275989
Reviews found no effect (1)
“trivial improvements in triglycerides, apoA-I, apoB/A-I, apoE, Lp(a), FFA, blood pressure, and BMI” PMID 42275989
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)
Products containing Beta Sitosterol
Top-scoring supplements in our catalog that list Beta Sitosterol on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
Evidence notes
Strong evidence for BPH urinary symptoms
Grade A: Multiple well-designed human trials support the main claims.
Related in Cardiometabolic
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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.