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Head-to-head evidence comparison — which supplement is right for you?
Beta-Sitosterol wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
4 of 5 studies with measurable effects showed benefit.
Top outcomes
Verdict
Probably helps
8 of 15 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (1)
Outcomes where both Beta-Sitosterol and Niacin have evidence — compare verdict strength side-by-side.
60-130mg daily for prostate; 2-3g for cholesterol
With meals (especially for cholesterol benefits), Divided doses
Standardized phytosterol complex
500-2000mg daily for lipid effects; 50-500mg for general health
With food (reduces flush), Evening for lipid effects, Split doses for high amounts
Immediate-release niacin (nicotinic acid)
4-8 weeks
4-6 weeks
4-8 weeks
4-8 weeks
30-60 minutes after dose
Efficacy and mechanisms of Xiangsha Liujunzi Decoction for gastroesophageal reflux disease: A study integrating meta-analysis, network pharmacology and molecular docking
Phytomedicine : international journal of phytotherapy and phytopharmacology (2026) · Meta analysis · n=646
Eight RCTs (n = 646) showed that XSLJZD significantly improved clinical outcomes compared with controls, demonstrating superior overall efficacy and reduced recurrence.
Efficacy and mechanism of Qianjinweijing Decoction for asthma: Integrating systematic review with meta-analysis and network pharmacology
Medicine (2025) · Meta analysis · n=1200
QJWJ is effective in the treatment of asthma, and the therapeutic mechanism may be related to its regulation of inflammation, immunity, and apoptosis.
Genome-wide association study and meta-analysis of phytosterols identifies a novel locus for serum levels of campesterol
Human genomics (2024) · Meta analysis · n=9758
The meta-analysis replicated most of the reported variants, and our study provided significant support for the association of variants in SCARB1 and ABO with sitosterolemia.
Niacin for primary and secondary prevention of cardiovascular events
The Cochrane database of systematic reviews (2017) · Meta analysis · n=39195
Participants randomised to niacin were more likely to discontinue treatment due to side effects than participants randomised to control group (RR 2.17, 95% CI 1.70 to 2.77; participants = 33,539; studies = 17; I2 = 77%; moderate-quality evidence).
Effect of lipid-lowering therapies on lipoprotein(a) levels: a comprehensive meta-analysis of randomized controlled trials
Atherosclerosis (2025) · Meta analysis · n=145314
Among available LLTs, PCSK9mAbs, inclisiran, CETPi, and niacin significantly decreased Lp(a) levels.
A terminal metabolite of niacin promotes vascular inflammation and contributes to cardiovascular disease risk
Nature medicine (2024) · Meta analysis
Lastly, treatment with physiological levels of 4PY, but not its structural isomer 2PY, induced expression of VCAM-1 and leukocyte adherence to vascular endothelium in mice.
Based on meta-analysis of 124 RCTs showing 6-12% LDL reduction at standard doses. Conservative effectiveness scale with optimal intake around 2g/day. No significant effects on HDL or triglycerides observed.
Based on multiple meta-analyses showing HDL increases. Higher doses increase discontinuation rates due to side effects (RR 2.17). Immediate-release forms have better lipid effects but more flushing.
AI-estimated from published studies. Interpret as directional guidance.
Beta-Sitosterol has a higher evidence score (7.5/10 vs 6/10) and wins in 2 of 3 categories.
For reduce inflammation, Niacin has a higher relevance score (85 vs 65).
No known interactions between Beta-Sitosterol and Niacin have been documented in our database. However, always consult a healthcare provider before combining supplements.