Caffeine Anhydrous vs Caffeine + L-Theanine for energy
Short answer: For energy, users rate them about the same: 83% report improvement with Caffeine Anhydrous (12 reports) and 82% with Caffeine + L-Theanine (28 reports).
Caffeine Anhydrous has 0 meta-analyses and 9 randomized trials on PubMed; the other has not been graded.
Based on 29 reports about Caffeine Anhydrous and 121 about Caffeine + L-Theanine. Not medical advice.
| Caffeine Anhydrous Supplement | Caffeine + L-Theanine Supplement | |
|---|---|---|
| Users say it helped | 75%helped8 reports · few reports | 78%helped77 reports · medium confidence |
| Verdict | Mostly positive | Mostly positive |
| Research | BResearch: Moderate | Not graded |
| Meta-analyses / RCTs | 0 / 9 | — |
| Mainly used for | ||
| Focus % reporting improvement | 100% (5) | 91% (66) |
| Energy % reporting improvement | 83% (12) | 82% (28) |
| Anxiety % reporting improvement | — | 100% (17) |
| Mood % reporting improvement | — | 100% (6) |
| Common side effects | jitteriness, anxiety, fatigue, nasal irritation | drowsiness, frequent urination, insomnia, nausea |
| Typical dose reported | 200 mg | 400 mg caffeine / 800 mg l-theanine |
Caffeine AnhydrousFull Caffeine Anhydrous profile →
What a user said
“I've found that 200mg of caffeine anhydrous is the most productive and enjoyable form, personally.”
Caffeine + L-TheanineFull Caffeine + L-Theanine profile →
What a user said
“I was hit with a surge of focus and mental clarity that I have not experienced in a very very long time.”
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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