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Head-to-head evidence comparison — which supplement is right for you?
Cistanche vs Glycine: Glycine has the stronger overall evidence (6.5 vs 5.5/10); 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.
Glycine wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Too few graded studies
Top outcomes
Verdict
Too few graded studies
1 of 2 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (1)
Outcomes where both Cistanche and Glycine have evidence — compare verdict strength side-by-side.
100-200mg extract or 1-3g dried herb. These are typical label doses. The one cited trial that states a dose gave 5 g doses of an extract of a different species, Cistanche deserticola.
Morning with food, Can divide into two doses
Standardized extract (echinacosides)
3g before bed (no cited trial states the dose it used)
30-60 minutes before bed
Powder (dissolves easily, tastes sweet)
2-4 weeks
4-8 weeks
4-8 weeks
First few nights
Next morning
Immediate
Bioactive Components, Pharmacological Properties, and Applications of Cistanche deserticola Y. C. Ma: A Comprehensive Review
Nutrients (2025) · Review
Mechanism analysis elucidated its anti-fatigue and immune-enhancing activities, primarily through the modulation of pivotal signaling pathways, including NF-κB, AMPK, and TLR4.
Considering traditional Chinese medicine as adjunct therapy in the management of chronic constipation by regulating intestinal flora
Bioscience trends (2024) · Review
Therefore, we reviewed the relationship between intestinal flora and chronic constipation as well as advances in research on TCM as adjunct therapy in the management of chronic constipation by regulating intestinal flora.
Phytochemistry, synthesis, analytical methods, pharmacological activity, and pharmacokinetics of loganin: A comprehensive review
Phytotherapy research : PTR (2022) · Systematic review
Loganin, an IG, is one of the main active ingredient of Cornus officinalis Sieb. et Zucc., which approved as a medicinal and edible plant in China.
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.
Glycine has a higher evidence score (6.5/10 vs 5.5/10) and wins in 2 of 3 categories.
For menopause support, Cistanche has a higher relevance score (80 vs 62).
No documented interaction was found in the data searched. This does not establish that this exact combination is safe.
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.