L-Theanine vs Phenylpiracetam for focus
Short answer: For focus, more users report improvement with Phenylpiracetam — 90% of 205 reports, versus 85% of 339 for L-Theanine.
L-Theanine has 18 meta-analyses and 78 randomized trials on PubMed; Phenylpiracetam has 0 and 0.
Based on 2,343 reports about L-Theanine and 649 about Phenylpiracetam. Not medical advice.
| L-Theanine Supplement | Phenylpiracetam Supplement | |
|---|---|---|
| User score | 55 | 56 |
| Verdict | Mostly positive | Mostly positive |
| Positive of reports that state an outcome | 64% | 67% |
| Reports | 2,343 | 649 |
| Research | AResearch: Strong | DResearch: None |
| Meta-analyses / RCTs | 18 / 78 | 0 / 0 |
| Mainly used for | ||
| Weight loss % reporting improvement | — | 100% (2) |
| Appetite % reporting improvement | 100% (2) | 50% (2) |
| Focus % reporting improvement | 85% (339) | 90% (205) |
| Energy % reporting improvement | 65% (80) | 95% (126) |
| Sleep % reporting improvement | 78% (306) | 30% (10) |
| Anxiety % reporting improvement | 90% (881) | 70% (30) |
| Mood % reporting improvement | 72% (164) | 85% (72) |
| Memory % reporting improvement | 64% (11) | 100% (20) |
| Performance % reporting improvement | — | 100% (36) |
| Pain & inflammation % reporting improvement | 100% (5) | — |
| Libido % reporting improvement | 20% (10) | — |
| Hormones % reporting improvement | 50% (2) | — |
| Heart & lipids % reporting improvement | 83% (6) | 0% (2) |
| Immunity % reporting improvement | 100% (2) | — |
| Common side effects | drowsiness, brain fog, vivid dreams, fatigue | tolerance, insomnia, headache, jitteriness |
| Typical dose reported | 200 mg / bedtime | 100 mg / 100mg 5 days a week with 2 days off or 200mg once a week |
L-TheanineFull L-Theanine profile →
Latest review conclusion
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 ↗What a user said
“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!”
PhenylpiracetamFull Phenylpiracetam profile →
What a user said
“I took 100 mgs of phenylpiracetam. I was laughing with friends, I felt GOOD.”
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