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Head-to-head evidence comparison — which supplement is right for you?
Ginkgo Biloba vs L-Theanine: Ginkgo Biloba has the stronger overall evidence (7 vs 6/10); they're alternatives for reduce anxiety & stress — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Ginkgo Biloba wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Probably helps
9 of 13 studies with measurable effects showed benefit.
Top outcomes
Verdict
Likely helps
4 of 5 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (1)
Outcomes where both Ginkgo Biloba and L-Theanine have evidence — compare verdict strength side-by-side.
120-240mg standardized extract
With meals, Split into 2-3 doses
Standardized extract capsules (EGb 761)
100-200mg
Morning with coffee for focus, Evening for relaxation, As needed for stress
Suntheanine® capsules or powder
12-24 weeks
8-12 weeks
First week
30-60 minutes
30-60 minutes
30-60 minutes
Varies
Can We Use Ginkgo biloba Extract to Treat Alzheimer's Disease? Lessons from Preclinical and Clinical Studies
Cells (2022) · Meta analysis · n=2100
GBE was shown to reduce the escape latencies in several studies, in both rats and mice (I2 > 70%, p < 0.005).
Beneficial effects of Ginkgo biloba leaf extract on inflammatory markers: A systematic review and meta-analysis of the clinical trials
Phytotherapy research : PTR (2022) · Meta analysis · n=1104
In the meta-analysis, the weighted mean differences (WMD) in change for serum CRP were -1.5 mg/L (95% CI: -2.16, -0.85, p < 0.001).
Miscellaneous treatments for antipsychotic-induced tardive dyskinesia
The Cochrane database of systematic reviews (2018) · Meta analysis · n=1278
Studies were primarily of short (three to six6 weeks) duration with small samples size (10 to 157 participants), and most (61%) were published more than 20 years ago.
The effects of L-theanine consumption on sleep outcomes: A systematic review and meta-analysis
Sleep medicine reviews (2025) · Meta analysis · n=897
The findings indicate the potential use of L-theanine in the management of sleep disturbances; however, the lack of studies on "pure" L-theanine warrants further investigation.
Efficiency of Different Supplements in Alleviating Symptoms of ADHD with or Without the Use of Stimulants: A Systematic Review
Nutrients (2025) · Systematic review
The evidence revealed the potential use of supplements as complementary ADHD treatments under clinical guidance.
Analysis of the Effects of Known Sleep-Support Supplements in Relation to Life Habits, Sleep Conditions, and Sleep Problems
Nutrients (2023) · Rct · n=160
All the tested supplements were found to ameliorate sleep problems significantly (Analysis 1).
Based on multiple meta-analyses including 2100+ participants showing benefits in mild dementia and memory. Effects modest and primarily in older adults or those with existing cognitive decline. Standardized extract (EGb 761) preferred.
Meta-analysis (n=897) and multiple RCTs support sleep benefits. Studies often used L-theanine in combination with other compounds, limiting pure L-theanine effect attribution. Effects include reduced sleep onset latency and improved subjective sleep quality.
AI-estimated from published studies. Interpret as directional guidance.
Ginkgo Biloba has a higher evidence score (7/10 vs 6/10) and wins in 2 of 3 categories.
For reduce anxiety & stress, L-Theanine has a higher relevance score (85 vs 48).
No known interactions between Ginkgo Biloba and L-Theanine have been documented in our database. However, always consult a healthcare provider before combining supplements.
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The honest tier list — proven staples vs situational vs mostly marketing. The hub the other guides feed into.
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The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.