Creatine vs L-Theanine for focus
Short answer: For focus, more users report improvement with Creatine — 92% of 211 reports, versus 85% of 339 for L-Theanine.
Creatine has 763 meta-analyses and 2,794 randomized trials on PubMed; L-Theanine has 18 and 78.
Based on 1,564 reports about Creatine and 2,343 about L-Theanine. Not medical advice.
| Creatine Supplement | L-Theanine Supplement | |
|---|---|---|
| User score | 53 | 55 |
| Verdict | Mostly positive | Mostly positive |
| Positive of reports that state an outcome | 67% | 64% |
| Reports | 1,564 | 2,343 |
| Research | AResearch: Strong | AResearch: Strong |
| Meta-analyses / RCTs | 763 / 2,794 | 18 / 78 |
| Mainly used for | ||
| Weight loss % reporting improvement | 82% (11) | — |
| Appetite % reporting improvement | 67% (3) | 100% (2) |
| Focus % reporting improvement | 92% (211) | 85% (339) |
| Energy % reporting improvement | 97% (205) | 65% (80) |
| Sleep % reporting improvement | 27% (73) | 78% (306) |
| Anxiety % reporting improvement | 62% (24) | 90% (881) |
| Mood % reporting improvement | 85% (103) | 72% (164) |
| Memory % reporting improvement | 91% (70) | 64% (11) |
| Performance % reporting improvement | 97% (320) | — |
| Recovery % reporting improvement | 98% (62) | — |
| Pain & inflammation % reporting improvement | 50% (4) | 100% (5) |
| Digestion % reporting improvement | 0% (6) | — |
| Libido % reporting improvement | 82% (11) | 20% (10) |
| Hormones % reporting improvement | 75% (12) | 50% (2) |
| Blood sugar % reporting improvement | 100% (3) | — |
| Heart & lipids % reporting improvement | 67% (6) | 83% (6) |
| Skin & hair % reporting improvement | 17% (12) | — |
| Immunity % reporting improvement | — | 100% (2) |
| Longevity % reporting improvement | 100% (4) | — |
| Common side effects | hair loss, stomach issues, insomnia, water retention | drowsiness, brain fog, vivid dreams, fatigue |
| Typical dose reported | daily | 200 mg / bedtime |
The results of the meta-analysis suggest that creatine supplementation did not significantly alter serum creatinine levels (standardized mean difference = 0.48, 95% confidence interval 0.24-0.73, P = .001, I2 = 22%), and did not alter plasma urea values (standardized mean difference = 1.10, 95% confidence interval 0.34-1.85, P = .004, I2 = 28%). The findings indicate that creatine supplementation does not induce renal damage in the studied amounts and durations.
J Ren Nutr, 2019 ↗“I actually feel a lot better. Mentally clearer and more balanced, like I have my brain back.”
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