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Head-to-head evidence comparison — which supplement is right for you?
Beta-Sitosterol vs Glycine: they're closely matched on evidence (5 vs 6.5/10); they're alternatives for menopause support — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Beta-Sitosterol and Glycine are closely matched across evidence, studies, and safety.
Verdict
Too few graded studies
Top outcomes
Verdict
Too few graded studies
1 of 2 studies with measurable effects showed benefit.
Top outcomes
60 to 130 mg a day for BPH urinary symptoms, the doses of the two six-month placebo-controlled trials: 20 mg three times a day, and 130 mg of free beta-sitosterol once a day. Both used phytosterol extracts with beta-sitosterol as the main component, so check the label for the beta-sitosterol content. For lowering cholesterol, gram doses of plant sterols or stanols are a different product: see the Plant Sterols & Stanols entry.
Once daily or in divided doses
Phytosterol extract standardised to beta-sitosterol
3g before bed (no cited trial states the dose it used)
30-60 minutes before bed
Powder (dissolves easily, tastes sweet)
4-8 weeks
First few nights
Next morning
Immediate
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
Systematic review and meta-analysis of 14 studies in 1,200 people with asthma, comparing Qianjinweijing Decoction, a four-herb traditional Chinese medicine, with routine drug treatment.
Treatment of gouty arthritis with traditional Chinese medicine decoction: Meta-analysis, network pharmacology analysis, and molecular docking
Medicine (2024) · Meta analysis · n=7151
TCMD could be a satisfactory complementary and alternative therapy for GA.
The effect of glycine administration on the characteristics of physiological systems in human adults: A systematic review
GeroScience (2024) · Systematic review
The nervous system demonstrated the most positive effects, including improved psychiatric symptoms from longer-term glycine administration in psychiatric populations.
Glutamatergic drugs for schizophrenia
The Cochrane database of systematic reviews (2006) · Meta analysis · n=358
NMDA receptor co-agonists glycine and D-serine showed some effects in reducing the negative symptoms of schizophrenia (n=132, SMD -0.66, CI -1.0 to -0.3, p=0.0004), but the magnitude of the effect was moderate.
Ingestion of a Whey Plus Collagen Protein Blend Increases Myofibrillar and Muscle Connective Protein Synthesis Rates
Medicine and science in sports and exercise (2025) · Rct · n=28
In addition, myofibrillar protein synthesis rates were higher in BLEND compared with PLA in both the rested (0.038 ± 0.008 and 0.031 ± 0.006%·h -1 , respectively; P < 0.05) and exercised (0.052 ± 0.011 and 0.039 ± 0.009%·h -1 , respectively; P < 0.01) leg.
Both Beta-Sitosterol and Glycine are closely matched — the best choice depends on your specific health goals.
For menopause support, Beta-Sitosterol has a higher relevance score (85 vs 62).
No documented interaction was found in the data searched. This does not establish that this exact combination is safe.
The popular one (saw palmetto) mostly fails in rigorous trials; beta-sitosterol is the better bet.
Ashwagandha, L-theanine, magnesium, saffron — what actually helps stress, and the safety caveats.
When to take what, with or without food, and which supplements compete vs pair well.
Melatonin, magnesium, glycine, L-theanine — tiered by evidence, plus a wind-down timeline.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.