L-Theanine with Caffeine
People mainly take L-Theanine with Caffeine for focus, anxiety. Based on 10 first-hand reports. Ranked #374 of 1,974 overall.
31
User score
Mostly positive50% positive0% mixed10% negative40% unclear
Of reports that state an outcome, 83% are positive.
Clinical research
Research pending
What L-Theanine with Caffeine does, according to users
Of the people who reported each effect, the share who said it got better.
2 more with fewer than 3 reports
betterno changeworse
What the research says
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
Research data for L-Theanine with Caffeine is being compiled.
Dosage people report
As stated by users — not a recommendation. Follow the label or your doctor.
100mgdaily
200 mg l-theanine, 50-100 mg caffeineas reported
400-800 mgas reported
Reported side effects
How often each side effect came up across all reports.
anxiety ×1palpitations ×1
What users say
Verbatim quotes, shortened only — each links to the original discussion.
“I have l theanine and coffee tablet and felt nothing. I couldn't even notice a subtle difference.”
“I take caffeine pills that contain l-theanine already mixed into it”
“For me, 100mg of theanine is more than enough to last me through the day in a good and relaxed mood.”
“there's actually evidence that when combined with caffeine it boosts cognition”
“Trying adding theanine with caffeine; it eliminates the anxiety...I tried that, it still makes me feel super alert...heart rate hits 130”
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User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 2, 2026. How we rate