L-Theanine vs Tyrosine for focus
Short answer: For focus, users rate them about the same: 88% report improvement with L-Theanine (501 reports) and 85% with Tyrosine (294 reports).
L-Theanine has 18 meta-analyses and 78 randomized trials on PubMed; Tyrosine has 2,190 and 1,766.
Based on 3,475 reports about L-Theanine and 1,662 about Tyrosine. Not medical advice.
| L-Theanine Supplement | Tyrosine Supplement | |
|---|---|---|
| Users say it helped | 65%helped1,807 reports · high confidence | 55%helped632 reports · high confidence |
| Verdict | Mostly positive | Mixed |
| Research | AResearch: Strong | AResearch: Strong |
| Meta-analyses / RCTs | 18 / 78 | 2,190 / 1,766 |
| Mainly used for | ||
| Anxiety % reporting improvement | 91% (1289) | 57% (53) |
| Focus % reporting improvement | 88% (501) | 85% (294) |
| Mood % reporting improvement | 77% (223) | 83% (259) |
| Sleep % reporting improvement | 78% (370) | 33% (12) |
| Energy % reporting improvement | 68% (97) | 91% (238) |
| Common side effects | drowsiness, vivid dreams, fatigue, headache | anxiety, headache, irritability, jitteriness |
| Typical dose reported | 200 mg / bedtime | 500 mg / daily |
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!”
In patients with EGFR-mutated NSCLC, first and third generation EGFR tyrosine kinase inhibitors, as well as combination therapies with antiangiogenesis, were associated with increased risks of cardiovascular adverse events. Risks were significantly higher with third generation compared with first generation inhibitors.
BMJ, 2025 ↗“I stack taurine with tyrosine and creatine and that has helped my mood noticeably and also helps me feel stronger and more energetic.”
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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