L-Theanine vs Modafinil for focus
Short answer: For focus, users rate them about the same: 85% report improvement with L-Theanine (337 reports) and 84% with Modafinil (447 reports).
L-Theanine has 18 meta-analyses and 78 randomized trials on PubMed; Modafinil has 155 and 297.
Based on 2,328 reports about L-Theanine and 1,097 about Modafinil. Not medical advice.
| L-Theanine Supplement | Modafinil Medication | |
|---|---|---|
| User score | 55 | 45 |
| Verdict | Mostly positive | Mixed |
| Positive of reports that state an outcome | 64% | 48% |
| Reports | 2,328 | 1,097 |
| Research | AResearch: Strong | AResearch: Strong |
| Meta-analyses / RCTs | 18 / 78 | 155 / 297 |
| Mainly used for | ||
| Weight loss % reporting improvement | — | 100% (5) |
| Appetite % reporting improvement | 100% (2) | 40% (15) |
| Focus % reporting improvement | 85% (337) | 84% (447) |
| Energy % reporting improvement | 65% (80) | 91% (301) |
| Sleep % reporting improvement | 78% (305) | 19% (75) |
| Anxiety % reporting improvement | 90% (872) | 26% (73) |
| Mood % reporting improvement | 72% (163) | 62% (88) |
| Memory % reporting improvement | 64% (11) | 71% (21) |
| Performance % reporting improvement | — | 88% (17) |
| Pain & inflammation % reporting improvement | 100% (5) | — |
| Libido % reporting improvement | 20% (10) | 25% (8) |
| Hormones % reporting improvement | 50% (2) | — |
| Heart & lipids % reporting improvement | 83% (6) | 9% (11) |
| Skin & hair % reporting improvement | — | 50% (2) |
| Immunity % reporting improvement | 100% (2) | — |
| Common side effects | drowsiness, brain fog, vivid dreams, fatigue | insomnia, anxiety, headache, tolerance |
| Typical dose reported | 200 mg / bedtime | as needed |
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 ↗“I find 4-hydroxyphenylalanine and L-γ-glutamylethylamide make a huge difference in keeping myself on an even keel..”
Our findings represent the most comprehensive available evidence base to inform patients, families, clinicians, guideline developers, and policymakers on the choice of ADHD medications across age groups. Taking into account both efficacy and safety, evidence from this meta-analysis supports methylphenidate in children and adolescents, and amphetamines in adults, as preferred first-choice medications for the short-term treatment of ADHD. New research should be funded urgently to assess long-term effects of these drugs.
Lancet Psychiatry, 2018 ↗“It works well, but you will need to drink lots of water since its a diuretic... getting sucked into a single task is pretty common with me”
Related comparisons
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