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supplementNot FDA-approvedOTC supplementBeta-sitosterol is sold OTC as a dietary supplement in the US and is not FDA-approved as a drug for BPHThe Cochrane review found beta-sitosterol improved urinary symptom scores and flow measures versus placebo but noted trials did not establish long-term effects on disease progression

Beta-SitosterolBenefits, Dosage & Interactions

Also known as: phytosterol

Beta-sitosterol is a phytosterol structurally similar to cholesterol. It is used both for BPH urinary symptoms and, at higher doses, for LDL cholesterol reduction. Research on Beta-Sitosterol focuses on prostate health and men's healthspan. Dose, response, and interaction risk vary by individual, so use should be reviewed with a clinician.

How much Beta-Sitosterol do people take?

The Cochrane review pooled trials using beta-sitosterol preparations at roughly 60–130 mg per day, drawn from the included randomized trials rather than a single fixed dose. Route reported: Oral, taken as tablets or capsules across the trials included in both systematic reviews. Frequency reported: Daily dosing, typically divided into two or three doses in the included trials. These are amounts documented in the cited studies and labels for Beta-Sitosterol — they are reported for reference, not a recommendation. Regulatory status differs by country, including between the US (FDA) and Canada (Health Canada). Confirm any amount with a licensed clinician before you take it.

See the full reported protocol and its sources

Researched by DoseRoutine Research TeamReviewed for accuracy by Nicholas Alexander, RSE, SO, PMPLast updated Educational reference only — not medical advice. Always confirm dosing and safety decisions with a licensed clinician.

Evidence: Moderate — Covered by a systematic review, without regulatory approval.
Evidence strengthModerate · 3/4
PreclinicalStrong human evidence

Covered by a systematic review, without regulatory approval.

Chemical structure of Beta-Sitosterol (PubChem CID 222284)
Structure via PubChem
Plasma half-life
Not applicable
Food rule
with food

What published protocols report

Ranges documented in the literature, shown for reference. DoseRoutine does not recommend an amount — your prescriber or the product label sets the dose.

Reported amounts
The Cochrane review pooled trials using beta-sitosterol preparations at roughly 60–130 mg per day, drawn from the included randomized trials rather than a single fixed dose[1][2]
Route studied
Oral, taken as tablets or capsules across the trials included in both systematic reviews[1][2]
Frequency
Daily dosing, typically divided into two or three doses in the included trials[1][2]
Cycle length
Included trials ranged from about 4 to 26 weeks of treatment per the Cochrane review[1][2]

Reported for Beta-Sitosterol in the cited sources. Published ranges are not dosing advice.

References & evidence

Documents the Beta-Sitosterol entry is written from. Each number matches an inline marker above.

  1. [1]Beta-sitosterols for benign prostatic hyperplasia.Wilt T, Ishani A, MacDonald R, Stark G, Mulrow C, Lau J · The Cochrane Database of Systematic Reviews · 2000 · Peer-reviewed · PMID 10796740
  2. [2]beta-sitosterol for the treatment of benign prostatic hyperplasia: a systematic review.Wilt TJ, MacDonald R, Ishani A · BJU International · 1999 · Peer-reviewed · PMID 10368239
  3. [3]Nutraceutical treatment and prevention of benign prostatic hyperplasia and prostate cancer.Cicero AFG, Allkanjari O, Busetto GM, Cai T, Larganà G, Magri V · Archivio Italiano di Urologia, Andrologia · 2019 · Peer-reviewed · PMID 31577095

References & Evidence

Sources on this page that document Beta-Sitosterol dosing, timing and safety.

  1. [1]National Center for Biotechnology Information View source

Educational information only — not medical advice. Dose ranges vary by person, indication and prescriber.

What is Beta-Sitosterol studied for?

Prostate HealthMen's Longevity

What is Beta-Sitosterol?Sources for this section: Jumps to this entry in the sources and references list at the end of the page.

Beta-sitosterol is a phytosterol structurally similar to cholesterol. It is used both for BPH urinary symptoms and, at higher doses, for LDL cholesterol reduction.

What does the research say about Beta-Sitosterol?

Tap a section to expand.

For the prostate, beta-sitosterol appears to modulate 5-alpha reductase activity and reduce prostate inflammation. In the gut, it competes with cholesterol for absorption, lowering LDL.

Source for this section: Sources for How does Beta-Sitosterol work?: Jumps to this entry in the sources and references list at the end of the page.

- Improves urinary flow rate and reduces residual bladder volume in BPH\n- Modest LDL cholesterol reduction (~10%) at 2 g/day\n- Often stacked with saw palmetto in prostate formulas

A 1999 Cochrane review of 519 men found beta-sitosterol significantly improved urinary symptom scores and peak flow versus placebo. LDL effects come from separate cardiovascular trials at higher (2 g) doses.

Mild GI upset, occasional loose stools. Very well tolerated overall.

People with sitosterolemia (a rare genetic disorder) should avoid high doses. May reduce absorption of fat-soluble vitamins if taken chronically at cholesterol-lowering doses.

Beta-sitosterol is contraindicated in individuals with the following conditions: * **Sitosterolemia (Phytosterolemia):** This rare hereditary metabolic disorder results in the excessive accumulation of plant sterols in the body due to impaired excretion. Ingesting beta-sitosterol can exacerbate this condition, leading to severe health consequences including accelerated atherosclerosis and hemolytic anemia (MedlinePlus, DrugBank). Therefore, individuals diagnosed with sitosterolemia must strictly avoid beta-sitosterol and other plant sterol-containing foods or supplements. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.

While beta-sitosterol is generally safe, certain interactions or considerations should be noted: * **Ezetimibe (Zetia):** This medication works by inhibiting cholesterol absorption in the small intestine, similar to beta-sitosterol. Taking beta-sitosterol concurrently with ezetimibe could potentially lead to an additive effect on reducing cholesterol absorption. While not typically considered a 'do not mix' scenario, individuals on ezetimibe should discuss beta-sitosterol supplementation with their doctor to monitor cholesterol levels and adjust medication if necessary (DrugBank). * **Cholesterol-Lowering Medications (Statins, Bile Acid Sequestrants):** Beta-sitosterol can be used alongside these medications and may contribute to further lowering of LDL cholesterol. However, any addition of supplements should be discussed with a healthcare provider to ensure coordinated management of cholesterol levels and to avoid potential over-treatment or unexpected effects. Regular monitoring of lipid profiles is advisable. * **Fat-Soluble Vitamin Supplements:** As beta-sitosterol can interfere with the absorption of dietary fats, there is a theoretical possibility that it could modestly reduce the absorption of fat-soluble vitamins (A, D, E, K) if taken simultaneously. To mitigate this, consider taking fat-soluble vitamin supplements at a different time of day than beta-sitosterol, or discuss optimal timing with a clinician if concerns exist. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.

For prostate: 60–130 mg/day with meals, split into 2–3 doses. For LDL: 2 g/day with the largest meal.

Source for this section: Sources for When should you take Beta-Sitosterol?: Jumps to this entry in the sources and references list at the end of the page.

What interacts with Beta-Sitosterol?

Documented interactions for Beta-Sitosterol: the other compound, the severity and confidence of the interaction, what happens, and what to do.
Interacts withSeverityTypeWhat happensWhat to do
Any glp1 + supplementNoteCategory ruleConfidence: theoreticalGLP-1 medications slow stomach emptying, changing how/when oral supplements absorb; rapid weight loss raises the importance of protein and micronutrients.Source pendingTime oral supplements when nausea is lowest; prioritize protein and micronutrients; discuss with your provider.
Any supplement + medicationNoteCategory ruleConfidence: theoreticalSome supplements change how the body processes medications (absorption, liver enzymes, or additive effects).Source pendingSpecific pairs are checked against a licensed drug database and shown with their own severity. Always confirm with your provider or pharmacist.

Frequently asked questions about Beta-Sitosterol

Beta-Sitosterol is a supplement. It is also known as phytosterol. What follows is drawn from peer-reviewed literature indexed on PubMed, FDA label text where a label exists, and NIH reference records.

Beta-Sitosterol is commonly discussed in the context of supporting prostate and mens-longevity. Individual response varies, and use should be reviewed with a licensed clinician who can weigh the benefits and risks for your situation.

For Beta-Sitosterol, it is typically taken null and it is usually taken with food. Always follow the specific dose your clinician or the product label prescribes.

Beta-Sitosterol carries potential side effects and drug interactions, documented in NIH, Mayo Clinic, and FDA label sources. Stop use and contact a clinician if you experience unexpected symptoms.

Beta-Sitosterol is a supplement, and interactions are possible with prescriptions, hormones, peptides and other supplements in the same routine. Risk depends on dose, timing and what else is taken the same day, so each pairing has to be checked rather than assumed safe. The free checker at https://doseroutine.com/interaction-checker covers Beta-Sitosterol with no sign-up.

Combining a supplement like Beta-Sitosterol with TRT is usually a question of labs rather than a blanket yes or no: the ester, injection interval and any aromatase inhibitor all change the answer. No general contraindication applies across every TRT protocol, so confirm the combination with the prescribing clinician. See the free TRT interaction reference: https://doseroutine.com/trt-supplement-interactions

Each peptide class carries its own profile against Beta-Sitosterol: a healing peptide raises different questions than a GLP-1 agonist or a growth-hormone secretagogue. Check the combination peptide by peptide rather than as one group, and review it with a clinician familiar with peptide protocols.

Published frequency for Beta-Sitosterol varies by protocol and formulation, so the label or prescription is what sets it. Most protocols have it taken with food. Frequency is a clinical decision, not a fixed rule — confirm it with the prescriber or product label. Comparison of apps that keep a schedule like this: https://doseroutine.com/best-dose-tracking-apps

The effect of a missed dose of Beta-Sitosterol depends on the protocol and formulation you are on. Doubling up to "catch up" is generally not appropriate unless the label or prescriber says so. Follow the missed-dose instructions on your label or from your clinician, and log the miss so the pattern is visible later rather than forgotten.

For Beta-Sitosterol the useful record is the dose, the time it was actually taken, and what else was taken in the same window. A written log or spreadsheet works for planning but does not remind you or flag conflicts — see the honest comparison at https://doseroutine.com/vs/spreadsheet and the wider roundup at https://doseroutine.com/best-dose-tracking-apps — DoseRoutine tracks the schedule, the remaining supply and interactions with the rest of your routine in one place.

The Cochrane review pooled trials using beta-sitosterol preparations at roughly 60–130 mg per day, drawn from the included randomized trials rather than a single fixed dose. Route reported: Oral, taken as tablets or capsules across the trials included in both systematic reviews. Frequency reported: Daily dosing, typically divided into two or three doses in the included trials. These are amounts documented in the cited studies and labels for Beta-Sitosterol — they are reported for reference, not a recommendation. Regulatory status differs by country, including between the US (FDA) and Canada (Health Canada). Confirm any amount with a licensed clinician before you take it.

Sources cited on this page

Specific documents referenced by the numbered markers above. Each number matches the marker in the text.

  1. PubChem CID 222284(opens in a new tab)National Center for Biotechnology Information · pubchem.ncbi.nlm.nih.gov/compound/222284

Verify at

Publisher search links for Beta-Sitosterol. These are places to check the information — they are not citations, so they are not numbered.

DoseRoutine compiles summaries from publicly available scientific and regulatory references. Always verify important decisions with a licensed clinician. How we source and review this information.

What is the short answer on Beta-Sitosterol?

Plain-text summary, safe to quote verbatim:

Beta-sitosterol is a phytosterol structurally similar to cholesterol. It is used both for BPH urinary symptoms and, at higher doses, for LDL cholesterol reduction. Research on Beta-Sitosterol focuses on prostate health and men's healthspan. Dose, response, and interaction risk vary by individual, so use should be reviewed with a clinician.
Source: DoseRoutine — https://doseroutine.com/library/beta-sitosterol

Cite this page

Using this in an article, AI answer, or research note? Please attribute:

DoseRoutine. (2026). Beta-Sitosterol — Overview, Benefits & Side Effects. Retrieved from https://doseroutine.com/library/beta-sitosterol
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What compounds are similar to Beta-Sitosterol?

Others in the supplement category or studied for the same goals.

Which goals is Beta-Sitosterol used for?

Other compounds studied for the same benefits as Beta-Sitosterol.

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Men's Longevity

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