Green Tea Extract vs L-Theanine for focus
Short answer: For focus, more users report improvement with Green Tea Extract — 95% of 55 reports, versus 88% of 501 for L-Theanine.
Green Tea Extract has 32 meta-analyses and 144 randomized trials on PubMed; L-Theanine has 18 and 78.
Based on 635 reports about Green Tea Extract and 3,475 about L-Theanine. Not medical advice.
| Green Tea Extract Supplement | L-Theanine Supplement | |
|---|---|---|
| Users say it helped | 69%helped203 reports · high confidence | 65%helped1,807 reports · high confidence |
| Verdict | Mostly positive | Mostly positive |
| Research | AResearch: Strong | AResearch: Strong |
| Meta-analyses / RCTs | 32 / 144 | 18 / 78 |
| Mainly used for | ||
| Anxiety % reporting improvement | 84% (43) | 91% (1289) |
| Focus % reporting improvement | 95% (55) | 88% (501) |
| Sleep % reporting improvement | 46% (13) | 78% (370) |
| Mood % reporting improvement | 91% (23) | 77% (223) |
| Energy % reporting improvement | 93% (54) | 68% (97) |
| Common side effects | insomnia, liver damage, liver failure, stomach issues | drowsiness, vivid dreams, fatigue, headache |
| Typical dose reported | 750 mg | 200 mg / bedtime |
Our results suggest that GTE supplementation can attenuate oxidative stress, BM, BMI and BFP, which are thought to negatively affect human health. Moreover, GTE as a nutraceutical dietary supplement can increase TAC and adiponectin.
Br J Nutr, 2024 ↗“So I switched to green tea in the morning! Holy shit. The change has been incredible. I feel way less anxious, all depression thoughts have dissipated and I am proud of who I am.”
This meta-analysis provides evidence that theanine plus caffeine, and theanine alone, could be beneficial for cognitive and mood outcomes. More research using tea beverages or tea-equivalent bioactive doses and research in free-living participants is needed.
Nutr Rev, 2025 ↗“This morning was my first time taking this combination along with my other daily vitamins and wow, what a difference it has made in my overall mood and anxiety!”
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Percentages come from first-hand user reports and are not clinical outcomes. Talk to a doctor before starting, stopping or combining anything. How we rate