Plant Sterols
Also known as: phytosterols, phytostanols
A large dose-response meta-analysis of randomized trials found no meaningful effect of plant sterol supplementation on body weight, percentage fat mass or waist circumference and a very small reduction in BMI. Controlled feeding trials of a cholesterol-lowering plant-based ‘portfolio’ diet that includes phytosterols produced consistent changes in multiple circulating metabolites over 2–4 weeks.
Last reviewed: 2026-10-14 · 2 indexed studies
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Overview
Plant sterols (phytosterols and phytostanols) are plant-derived sterol compounds commonly added to foods and supplements and are a component of cholesterol-lowering dietary patterns. Human trials and meta-analyses have evaluated their effects on anthropometry and on metabolomic profiles when included in controlled diets.
Mechanism & Function
Mechanism of Action
Direct mechanistic claims about absorption or molecular targets are not reported in the provided abstracts. The portfolio diet trial notes cholesterol-lowering effects of the overall diet that includes phytosterols and observed changes in lipid- and phospholipid-related metabolites, suggesting phytosterols may influence lipid metabolism when consumed as part of a cholesterol-lowering dietary pattern.
Physiological Role
Not explicitly defined in the provided abstracts beyond being bioactive plant compounds present in foods and being a component of cholesterol-lowering diets that alter circulating metabolites.
Primary Pathways
Performance / Health Relevance
The provided evidence does not support a direct ergogenic or body-composition benefit from plant sterol supplementation; metabolic changes were observed within a cholesterol-lowering dietary intervention but anthropometric effects were largely null.
Evidence Review
Practical Use & Dosage
- Minimum Effective Dose
- Not established from the provided abstracts
- Optimal Range
- Not established from the provided abstracts
- Upper / Caution Level
- Not established from the provided abstracts
- Timing
- Not established from the provided abstracts
- Best Format
- Food-based fortification or inclusion within a controlled diet as used in feeding trials
- Bioavailability
- Not described in the provided abstracts
- Absorption Considerations
- Not described in the provided abstracts
Safety & Interactions
Side Effects
- •No specific side effects reported in the provided abstracts
Contraindications
- None reported in the provided abstracts
Drug Interactions
- •Not specified in the provided abstracts
Who Should Avoid
- •Not specified in the provided abstracts
Monitoring
The abstracts do not provide guidance on monitoring; when used as part of lipid-lowering interventions, clinical lipid measurements are commonly employed in practice but are not reported here.
Frequently Asked Questions
Auto-generated from indexed evidence — dosage, safety, interactions, and more.
When is Plant Sterols typically used or indicated?
Plant Sterols is most commonly used for: Support for blood lipid profile as part of cholesterol-lowering diets, General cardiovascular health food fortification, Component of plant-based dietary interventions. Not explicitly defined in the provided abstracts beyond being bioactive plant compounds present in foods and being a component of cholesterol-lowering diets that alter circulating metabolites.
How does Plant Sterols work?
Direct mechanistic claims about absorption or molecular targets are not reported in the provided abstracts. The portfolio diet trial notes cholesterol-lowering effects of the overall diet that includes phytosterols and observed changes in lipid- and phospholipid-related metabolites, suggesting phytosterols may influence lipid metabolism when consumed as part of a cholesterol-lowering dietary pattern.
What is the recommended dose of Plant Sterols?
The optimal range is Not established from the provided abstracts. with a minimum effective dose of Not established from the provided abstracts. Best taken: Not established from the provided abstracts. Upper / caution level: Not established from the provided abstracts.
What are the side effects of Plant Sterols?
Reported side effects include: No specific side effects reported in the provided abstracts. Monitoring: The abstracts do not provide guidance on monitoring; when used as part of lipid-lowering interventions, clinical lipid measurements are commonly employed in practice but are not reported here.
Does Plant Sterols interact with medications?
Known or theoretical interactions: Not specified in the provided abstracts. Always check with a clinician before combining with prescription medication.
Who should avoid Plant Sterols?
Plant Sterols is generally not recommended for: Not specified in the provided abstracts; and None reported in the provided abstracts.
How strong is the evidence for Plant Sterols?
Evidence level: Limited (overall score 52/100), based on 2 indexed studies on SuppIndex.
Research & References (2)
Possible anti-obesity effects of phytosterols and phytostanols supplementation in humans: A systematic review and dose-response meta-analysis of randomized controlled trials.
Dose-response meta-analysis of randomized controlled trials evaluating effects of phytosterols and phytostanols on anthropometric indices.
Metabolomic profiling of a cholesterol lowering plant-based diet from two randomized controlled feeding trials.
Two randomized controlled feeding trials of a cholesterol‑lowering ‘portfolio’ plant-based diet (which includes phytosterols) compared with control diets, using metabolomics to profile changes over 2–4 weeks.
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Research Overview
Limited EvidenceCite this ingredient
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Stable URL
https://thesuppindex.com/ingredients/plant-sterols
SuppIndex. (2026). Plant Sterols: Evidence summary, dosage and clinical studies. Retrieved October 16, 2026, from https://thesuppindex.com/ingredients/plant-sterols
Based on 2 indexed studies · Evidence level: Limited.
Goal Ratings
Stack Compatibility
Often used as a component of cholesterol-lowering dietary patterns or fortified foods; evidence in the abstracts pertains to use within broader diet interventions.