Caffeine + Theanine
People mainly take Caffeine + Theanine for focus. Based on 3 first-hand reports. Ranked #1559 of 1,974 overall.
6
User score
Not enough data0% positive0% mixed0% negative100% unclear
Of reports that state an outcome, 0% are positive.
Clinical research
Research pending
What Caffeine + Theanine does, according to users
Of the people who reported each effect, the share who said it got better.
betterno changeworse
What the research says
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
Research data for Caffeine + Theanine is being compiled.
Dosage people report
As stated by users — not a recommendation. Follow the label or your doctor.
100 mg caffeine200 mg theanine
Reported side effects
How often each side effect came up across all reports.
No side effects reported so far.
What users say
Verbatim quotes, shortened only — each links to the original discussion.
“Today I stacked 150 mg of phenylpiracetam with a 100 mg/200 mg caffeine/theanine capsule”
“wow why is caffeine + theanine so great”
“Caffeine with theanine?”
Other options for focus
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94% report better focus
Mostly positiveAResearch: Strong
Semaglutide
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67% report better focus
Mostly positiveAResearch: Strong
Intermittent Fasting
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94% report better focus
Mostly positive
Magnesium Glycinate
Supplement · 910 reports
70% report better focus
Mostly positiveCResearch: Limited
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